Atmospheric perspective, is an optical effect used in art, where distant objects appear hazy, less detailed, and a lighter shade of color than closer objects. This effect is created by the scattering of light in a medium such as air.
Atmospheric perspective gives a painting or drawing depth and a sense of distance, allowing the viewer to imagine a world beyond what is shown.
Atmospheric perspective is an important effect used in art to create a sense of depth and distance in a painting or drawing. It is achieved by the scattering of light in a medium, such as air, which causes distant objects to appear hazy, less detailed, and a lighter shade of color than closer objects.
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one year is about ____ seconds while one day is exactly ____ seconds.
One year is about 3.16 x 10^7 seconds while one day is exactly 86,400 seconds.
Calculating number of seconds in one day:In one hour, there are 60 minutes and in each minute, there are 60 seconds. While in one day there are 24 hours.
So
60 . 60 . 24 = 86, 400
giving 86, 400 seconds in a day.
Calculating the number of seconds in a year:In one year there exist 365 days.
Now multiply the number of days by the number of seconds of each day.
So,
86,400. 365 = 31,563,000 = 3.16 x 10^7 seconds
giving 3.16 x 10^7 seconds in a year.
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A woman is balancing on a high wire which is tightly strung.The tension in the wire is
The tension in the wire is
much less than the woman's weight.
about twice the woman's weight.
about equal to the woman's weight.
about half the woman's weight.
much more than the woman's weight.
the correct option is tension is much more than the women's weight.
The pulling force transmitted axially by a string, rope, chain, or similar object, or by each end of a rod, truss member, or similar three-dimensional object is referred to as tension. The action-reaction pair of forces acting at each end of the aforementioned elements may also be referred to as tension. The International System of Units (SI) uses newtons to measure tension as a transmitted force, an action-reaction pair of forces, or a restoring force (or pounds-force in Imperial units). The ends of a string or other object that transmits tension will apply forces in the direction of the string at the point of attachment to the objects to which the string or rod is linked.
When we resolve the components of tension force along and perpendicular to the direction of angle( )
The component in the vertical direction is =2Tsin[tex]\theta[/tex]
The component in the Horizontal direction is =Tcos[tex]\theta[/tex]
weight is in downward direction,
2Tsin[tex]\theta[/tex]>mg
T>[tex]\frac{mg}{2sin\theta}[/tex]
Since the angle is small, tension is more.
Therefore, the correct option is tension is much more than the women's weight.
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analyze what type of collision occurs when a tennis racket hits a ball, as shown in the image, and explain how you know. In addition, predict the motion after the collision.
The force that is exerted by the racket is greater than the force that is exerted by the ball. Option C
What is momentum?We have to note that the momentum of the object as we know it is the product of the mass and the velocity of the body. The principle of the conservation of the linear momentum states that the momentum before collision is equal to the momentum after collision.
We can see that the masses of the racket and the ball are not the same and we know hat the object that has the greater mass would surely exert more force as we can see from the image that has been attached to the question that we have in this case here. The collision here is an elastic Collison as is clear from the image.
The racket would then be able to exerted a force that is exerted by the ball.
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When placed in water some seeds sink while some of them float?
Seeds may float because they lack viable embryos or nutrition reserves, making them less dense than "good" seeds that sink in water. Or they may float because they include air pockets, which may not usually impair seed vigor or viability.
What is density?When a thing is more dense than water, it sinks; when an object is less dense than water, it floats. The density of a substance is the measure of how densely it is packed together. It is expressed as mass per unit volume. Symbol for density: D or Formula for Density: = m/V, where is the density, m is the object's mass, and V is the object's volume. It is a material substance's mass per unit volume. Density is sometimes expressed using the kilogram per cubic meter unit of measurement. Air, for example, has a density of 1.2 kilograms per cubic meter.
Here,
Because seeds lack viable embryos or nutrition reserves, they are less dense than "good" seeds, which sink in water. They may also float because they contain air pockets, which may not always impair seed vigor or viability.
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How much torque does a person produce if he applies a 12n force 1. 0m away from the pivot point, perpendicularly to the lever arm?.
The torque applied by the person if he applies 12N force 1 metre away form the pivot point is 12 Nm.
The torque will be calculated by the formula -
Torque = force applied × perpendicular distance to which the torque is applied
Keep the values in formula to find the value of torque
Torque = 12 × 1
Performing multiplication on Right Hand Side of the equation to find the value of applied torque
Torque = 12 Nm
Thus, the applied torque by the person on application of 12 N force perpendicular to the level arm, is 12 Nm.
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A ball has an initial velocity of 4m/s and a final velocity of 16m/s. The ball travels a distance of 25m. What is the acceleration of the ball? Give your answer to 2 decimal places.
The acceleration of the ball which experiences an initial velocity of 4m/s and a final velocity of 16m/s and covers a distance of 25 m is 4.80 m/s².
What is Acceleration?Acceleration can be defined as the change in the velocity of an object. It is a vector quantity as it has both the magnitude and direction. The SI unit of acceleration is meter per second square (m/s²).
The acceleration of the ball can be calculated through initial velocity, final velocity and distance through the equation:
2as = v² - u²
where, a = acceleration of the object,
s = distance covered by the object,
v = final velocity of the object,
u = initial velocity of the object
2 × a × 25 = (16)² - (4)²
50a = 256 - 16
50 a = 240
a = 240/ 50
a = 4.80 m/s²
Therefore, the acceleration of the ball is 4.80 m/s².
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A 1-kg balloon at equilibrium in the air is buoyed up with a force of _______.
a. 1 kilogram
b. 12 newtons
c. 10 newtons
d. 1 newton
A force of 10N raises a 1-kg balloon in the air at equilibrium. Since every force has an equal and equal response. Therefore, C. 10 newtons is the correct solution.
How does force work?A force is said to be applied when an item pushes or pulls. The items' contact results in push and pull. To convey pressure, you may also use terms like squeeze or stretch.
An agent with the power to alter a body's resting or mobile condition is known as an external force. It possesses a magnitude and a direction. The place where force is exerted is called the application, as well as the direction in which it is applied is called the direction of a pressure.
A source. The Force may be evaluated using balance. The Newton is the Si derived unit of force (N).
Weight of blimp: 1 kilogram
Using the equation W = m g
Think that g=10m/s2.
Weight is then computed as W = 1 kg * 10 m/s2 W = 10N.
According to Newton's law, the balloon in the air is lifted up by 10N since it is in balance.
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9. A person with mass of 60 kg standing on the dwarf planet Ceres would weigh 16.2 N. What is the
strength of gravity on the surface of Ceres?
Answer:
Explanation:
The gravitational force acting on an object is called its weight. The weight of an object is equal to its mass multiplied by the acceleration due to gravity.
We know that the weight of the person on Ceres is 16.2 N and the mass of the person is 60 kg. So we can calculate the acceleration due to gravity on Ceres by dividing the weight by the mass:
Weight (N) = Mass (kg) x acceleration due to gravity (m/s^2)
16.2 N = 60 kg x g
g = 16.2 N / 60 kg
g = 0.27 m/s^2
Therefore, the acceleration due to gravity on Ceres is 0.27 m/s^2
It's important to note that Ceres is a dwarf planet and has a weaker gravitational pull than Earth, so the weight of a person on Ceres would be less than the weight of the same person on Earth.
an o-star has a hotter surface temperature than the sun. therefore, compared to the sun,
An O-star has a hotter surface temperature than the Sun, so compared to the Sun, its emission peaks in the blue part of the spectrum.
An O-star is a hot, blue star of spectral type O in the Yerkes classification system. O-stars have temperatures of over 30,000 kelvin. They have strong lines of other ionized elements, strong absorption lines of ioniszed helium, and hydrogen and neutral helium lines that are weaker than spectral type B.
O-stars are very rare, but they can be seen at great distances because they are very bright. Because of their high mass, O-stars end their lives rather quickly in violent supernova explosions, which results in neutron stars or black holes.
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two poles of equal heights are standing opposite to each other on either side of a road, which is 80 m wide. froma point between them on the road, angles of elevation of their top are 30c and 60c. find the height of the polesand distance of point from pole
Along either side of such an 80 m wide road, two equal-height poles are positioned in opposition to one another. Angles of height of their tops are 30° and 60° from a point on the route between them. The poles are 20 m and 3 m in height, respectively, and the point is 20 m & 60 m away from the poles.
In physics, does H stand for height?A scale height, typically represented by the punctuation mark H, is a vertical or radial distance across where a physical quantity drops by the a factor of e this same base for natural or roughly 2.718.
A height formula is what?h(t) = -16t2+256t, in which t is time in seconds, yields this same height of the object, h(t). Determine the object's highest point and the moment it touches the ground. The goal of summertime business plan is to mow lawns.
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The angular resolution of the largest single-dish radio telescope in the United States, the 100 m Green Bank Telescope, is closest to________ when it operates at a wavelength of 20 cm.
The angular resolution of the 100 m Green Bank Telescope when it operates at a wavelength of 20 cm is approximately 1.6 arcseconds.
1. Calculate the telescope's diameter in meters:
100 m
2. Calculate the wavelength in meters:
20 cm = 0.2 m
3. Calculate the resolving power of the telescope:
Resolving power = D / λ
Resolving power = 100 m / 0.2 m
Resolving power = 500
4. Calculate the angular resolution:
Angular resolution = 1 / Resolving power
Angular resolution = 1 / 500
Angular resolution = 0.002 radians
5. Convert the angular resolution to arcseconds:
Angular resolution = 0.002 radians * (180/π) * (3600/1)
6. Calculate the telescope's diameter in meters:
100 m
7. Calculate the wavelength in meters:
20 cm = 0.2 m
8. Calculate the resolving power of the telescope:
Resolving power = D / λ
Resolving power = 100 m / 0.2 m
Resolving power = 500
9. Calculate the angular resolution:
Angular resolution = 1 / Resolving power
Angular resolution = 1 / 500
Angular resolution = 0.002 radians
10. Convert the angular resolution to arcseconds:
Angular resolution = 0.002 radians * (180/π) * (3600/1)
Angular resolution = 1.6 arcseconds
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how psychology has its roots in philosophy, and provide examples of two philosopher’s contributions.
Answer:
Psychology has its roots in the philosophy of the ancient Greek philosophers. Socrates, Aristotle, and Plato were instrumental in forming the basic hypothesis of the Theory of Forms and Aristotelian Logic. These early philosophers were searching for the path that the human mind takes in its search for truth.
Using at least 4 types of energy, give an example of how energy is converted from one form to another. Explain how the energy is changing
Answer:
6 types of energy and their transfers are noted: nuclear, light, chemical synthesis, chemical decomposition, mechanical , potential, and kinetic, along with an explanation.
Explanation:
Each energy transition is noted with a "*#."
1. Lets start with the solar system's sun. It is comprised of hydrogen and helium atoms that collide with enough force to join and become different elements. The nucleus is broken apart and particles rearrange to form a new atom, perhaps berylium. Some of the energy holding the nucleus together is released in the form of heat and light. The energy in the nucleus is relesased in a nuclear reaction *1.
*1 Nucleus of an atom releases energy as heat and light.
----------------
The light from the sun goes all directions. A portion hits the Earth during the daylight hours. Life has evolved on Earth to to the point that certain plants and some other organisms can capture the light energy. Trees are a good example. The chlorophyll in trees is able to capture the light energy and use it to synthesize compounds such as sugars (photosynthesis). The energy is used to create the bonds of the elements in a sugar molecule. *2 The process of photosynthesis makes structural compounds as well as sugars. The sugars carry the stored chemical energy to other parts of the plant involved with metabolism. When energy is required, the sugars are metabolized into smaller compounds, releasing the energy from the former chemical bonds.
*2 Chemical energy contained in chemical bonds
---------
Trees also contain complex polymeric celluloses that are made of of complex molecules with many high-energy bonds.That energy may be released if the wood is burned. *3 A small amount of heat, known as the activation energy (e.g., a match), can cause the bonds to break and release even more heat. This results in fires, which is the conversion of chemical energy into heat and light.
*3. Decomposition (sometimes combustion) is the release of chemical energy as heat and light.
----
The heat from a fire may be used to boil water and make steam. The ability of steam to create pressure on a piston to create movement is the foundation of the industrial revolution. This is the conversion of chemical energy to heat and then heat to mechanical motion.
*4. Conversion of heat to mechanical motion energy.
Stem engines do many tasks. One is to raise materials such as structural beams to heights above ground for the construction of building. The mechanical energy is tranferred into potential energy. *5 This is the energy contained in an object above Earth's surface. It can be recovered with the object comes back to Earth, if it were attached to a pulley that is used to lift something.
*5. Conversion of Mechanical energy to potential energy
An object above Earth has a potential energy that can be coverted to kinetic energy. If the object is allowed to drop, the potential energy is conveted into kinetic energy. *6 Physics and Chemistry have formulas that can precisely predict the speed and trajectory of such objects. They are based on the value for potential energy being converted to kinetic energy which is the speed of the object.
*6 Conversion of Potential energy to kinetic energy
Fire (Chemical energy → Heat and Light) Electric lamp (Electrical energy → Heat and Light) Microphone (Sound → Electrical energy) Wave power (Mechanical energy → Electrical energy)
What is energy ?Energy is characterised as having the "ability to accomplish work, which is the capacity to apply a force sufficient to move an object." Despite this unclear definition, the concept is actually quite straightforward energy is just the force that moves objects. Potential and kinetic energy are the two different categories.
It is possible to change the form of energy. Examples Our cars are filled with gasoline (chemical), which, with the aid of electrical energy from a battery, produces mechanical (kinetic) energy. Our TVs are powered by purchased electricity, which is then transformed into light and music.
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the _____ is a vast, spherical array of long period comet nuclei far beyond the orbit of neptune.
Far beyond of Neptune's orbit, there is a massive, spherical collection of long-period comet nuclei known as the Oort cloud.
The Oort Cloud, which is frequently referred to as a "cometary reservoir," is where long-period comets, or those that take more than 200 years to orbit the Sun, are most likely to originate. The orbits of long-period comets frequently have erratic orientations and are not always located close to the ecliptic. Long-period comets, many of which originate from the Oort Cloud region 100,000 astronomical units (or around 100,000 times the distance between Earth and the Sun) from the Sun, are less predictable. It may take these Oort Cloud comets up to 30 million years to make one round of the Sun.
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A 745 kg race car experiences an applied force from the engine of 38900 N and a frictional force of 34000 N. How long does it take to go from rest to 21 m/s ?
Answer:
0.215seconds
Explanation:
m = 745kg, Fe = 38900N, Fr = 34000, v = 21m/s, t = ?
Netforce{Fn} = Fe + Fr
Fn = 38900 + 34000
Fn = 72900N
Fn = mv/t
Making time subject of the formula
We have;
t = mv/Fn
t = (745 × 21)/72900
t = 0.215s
What will be the work done during expansion of a gas from 4dm3?
The work done during the expansion is -608J .
as the details stated in the question
the work done in the expansion from
4 [tex]dm^3[/tex] to 6 [tex]dm^3[/tex] is
work done is the negative of pressure times the change in the volumes of the gases
W = - P [tex]\triangle[/tex] V
where
W is said to be the work done
P is said to be the pressure
Δ V is the change in final and initial volumes of the gases
to calculate the work done
the pressure given is 3 atm
Now ,
W = - (3)x( 6-4)
W = - 3 x (2)
W = -6 L- atm
to convert atm into joules
-6 x 101.32
=> - 608J
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The complete question is
The work done during the expansion of a gas from a volume of 4 [tex]dm^3[/tex] to 6 [tex]dm^3[/tex] against a constant external pressure of 3 atm is ?
The work done during the expansion of a gas from 4dm³ is -608J.
The work done in the expansion from 4dm³ is -608J. Work done is the negative of pressure times the change in the volumes of the gases
W = - P V
where
W is the work done
P is the pressure
Δ V is the change in final and initial volumes of the gases
W = - (3)x( 6-4)
W = - 3 x (2)
W = -6 L-atm
In order to convert atmospheric into joules, we multiply
-6 x 101.32 = - 608J.
Work done in case is the force multiplied by distance in the mechanics case. Work done is nothing but the measure of movement or the change of anything with respect to the other measurable quantity. We can just calculate it by the help of physics. like wise we can see the work done in many aspects like in electricity and magnetism, we can find out about work done in cell potential, moving of a charge from one place to another and we can also calculate the work done in many other fields of mechanics like in momentum and energy of any object.
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Why do the gas motions of an accretion disk move smaller particles more easily than larger particles
The matter in the accretion disc is heated to extremely high temperatures, which ultimately lead to the emission of photon radiations, as the speed of the infalling particles becomes more random or chaotic.
We are aware that disordered microscopic particle motion, as defined, is thermal motion and is hence directly related to temperature. The most significant features in the universe are accretion discs, which can be found even in tight binary stars, surrounding smaller stars or stellar remnants, in spiral galaxy centers, in quasars, and they can even form in gamma-ray bursts. The shape of the accretion disc might vary. It could be planar or spherical.
They are bumping into other gas particles as they move. As a result, the movement's direction changes, and it now moves randomly. Particles that are travelling at random make up gas.
They are bumping into other gas particles as they move.
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The gas has a higher density of bigger particles. The motions of an accretion disc are easier on smaller particles than on larger ones. The density of the material (also known as its specific mass).
Mass in volume per unit. Although density can also be symbolised by the Latin letter D, the most typical mark is (the lower case Greek letter rho). A essential quality of a body is its mass. It was widely believed to be connected to the volume of matter in a physical body before to the atom's discovery and the development of particle physics. Theoretically, the same chemical might be included in different atoms and elementary particles. A essential quality of a body is its mass.
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Help out pls
Determine the force required to accelerate a 2-kilogram ball to an acceleration of 9.8 m/s2
Determine the acceleration of a 2-kilogram ball if a force of 25 newtons is applied
Answer:
Explanation:
F = ma = (2 kg)(9.8 m/s²) = 19.6 N
a = F/m = 25 N / 2 kg = 12.5 m/s²
how much heat q1q1 is transferred by 25.0 gg of water onto the skin? to compare this to the result in the previous part, continue to assume that the skin temperature does not change.
4.19 J of heat are transferred to the skin by 25.0 g of water. 2. Because the skin's temperature is unaffected, the total heat transmitted is 4.19 J plus 4.19 J, for a total of 10.39 J.
The short answer to what is heat transfer?In general, heat transfer refers to the movement of heat (thermal energy) brought on by temperature differences as well as the following distribution and alterations in temperature. The exchange of momentum, energy, and mass through conduction, convection, and radiation is the focus of the study of transport phenomena.
What is an example of heat transfer?Conduction: When you hold a hot cup of coffee, heat is transferred into your hands. Convection: When the barista "steams" cold milk to make hot cocoa, heat is transferred. Radiation: Microwave-heating a cold cup of coffee.
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What is the difference between mass and weight is the mass of an object on Earth the same as the mass of the same object on Jupiter?
Mass is constant independent of location or gravity. On Mars or Jupiter, you would have the same mass as you have on Earth. Gravity causes your weight to differ on other worlds.
What is mass?MASS: The entire amount of matter contained in a thing is referred to as its mass. The inertia of an item may be used to calculate its mass. The mass of an item is constant in all locations. It remains unchanged even when the value of 'g' equals 0.
What is weight?WEIGHT: The gravitational force by which the earth draws an item is referred to as weight. We may calculate weight using the formula W=m(mass)*g (acceleration due to gravity). It varies depending on where you go (variable). If the value of g is zero everywhere, the object's weight becomes zero.
Here,
The object's mass is constant. As a result, the mass would be the same on Earth and Mars. However, when it comes to weight, it will undoubtedly differ. Weight is determined by the value of g, and the values will differ in both locations.
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A 50-kg girl pulls a 20-kg wagon with a force of 10 Newtons. The wagon accelerates at 2 m/s2 . What is the force, in Newtons, exerted BY the wagon ON the girl
The force exerted by the wagon on the girl is 30 N.
The Newton second law of motion states that:
∑F = m . a
Where:
∑F = net force applied on the object
m = mass of the object
a = resulted acceleration
Hence, the object is accelerated if the net force applied on it is not zero.
In the given problem, the object is the 20-kg wagon.
Since the wagon is accelerated at 2 m/s², the net force acted on the wagon is not zero, or the force exerted by the girl on the wagon is not the same as the force exerted by the wagon on the girl.
Let
Fw = force exerted by the wagon on the girl.
∑F = m . a
10 + Fw = 20 x 2
Fw = 40 - 10 = 30 N
Hence,
The force exerted by the wagon on the girl is 30 N
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A low-mass main-sequence star's climb up the red giant branch is halted by:
the end of hydrogen shell burning.
the beginning of helium fusion in the core.
electron-degeneracy pressure in the core.
instabilities in the star's expanding outer layers.
The ascent of a low-mass main-sequence star to the red giant branch is stopped by the beginning of helium fusion in the core.
The star starts to compress and heat up, just like when a red giant forms. In the shell, helium starts to fuse with carbon. In a shell around the helium, hydrogen fuses. The star expands once again and turns redder as a result of the burning in the shell. The aforementioned image contrasts the various evolutionary routes that low-mass stars, such as the Sun, and high-mass stars take following the red giant phase. After the helium has fused into carbon in low-mass stars (left side), the core again collapses. The star's outer layers are ejected as the core disintegrates.
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Find an expression for the force F2 using arguments based on work (do not use a torque argument).
Express F2 in terms of F1, H1, and H2.
An Expression for the force F2 using arguments based on work (do not use a torque argument) is F1 × H1 ÷ H2.
The Conservation of Energy PrincipleThe force F2 can be expressed in terms of F1, H1, and H2 using the principle of conservation of energy. According to this principle, the work done on an object is equal to the change in its potential energy. Thus, the work done by F1 on the object can be represented as:
F1 * H1 = F2 * H2
Rearranging this equation to solve for F2, we get:
F2 = F1 * H1 / H2
So the force F2 is equal to the force F1 multiplied by the height H1, divided by the height H2.
The principle of conservation of energy is a fundamental concept in physics that is applicable to a wide range of subjects, including mechanics, thermodynamics, and electrical engineering. It is a fundamental principle in physics and it is used to study the behavior of systems and their interactions.
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A car is travelling along a road when the driver spots a hedgehog crossing ahead. The driver applies a braking force of 2500 N and manages to stop the car after 7.5 metres to avoid the hedgehog. Calculate the work done by the brakes to stop the car.
The work done by the brakes to stop the car will be 56.25 kN-m.
What is the work done?If the amount of force is applied to the body and the body gets displaced from its original place. Then it is said to work is done on the system. The work done is given as,
WD = Force x Displacement
A vehicle is going along a street when the driver detects a hedgehog crossing ahead. The driver applies a slowing down the power of 2500 N and figures out how to stop the vehicle after 7.5 meters to stay away from the hedgehog.
The work done is calculated as,
WD = 7500 x 7.5
WD = 56,250 N-m
WD = 56.25 kN-m
The work done by the brakes to stop the car will be 56.25 kN-m.
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Which of the following objects cannot transit (i.e. pass in front of) the Sun as seen from Jupiter? a. Saturn b. Mercury c. Mars d. Venus e. Earth
Saturn cannot transit (i.e. pass in front of) the Sun as seen from Jupiter.
The planet Saturn is the celestial object that, when viewed from Jupiter, cannot transit or pass in front of the Sun. Mercury, Venus, Earth, and Mars are the planets with the smallest orbits, whereas Jupiter is the fifth planet from the Sun. This indicates that occasionally, the orbits of the aforementioned planets pass between Jupiter and the Sun. Saturn, the sixth planet from the Sun, usually travels in an orbit that is greater than Jupiter because of its larger orbit. Saturn's orbit does not intersect Jupiter's orbit and will never be between Jupiter and the Sun, in contrast to Pluto, whose extremely elliptical orbit occasionally places it inside Neptune's orbit.
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If the effects of air resistance are included will part (A) or (B) give the higher speed? A. The part (A) will give the higher speed. B. The part (B) will give the higher speed
If air resistance is included, then part b will give higher is speed because the path of the ball in the first part, a is longer so more negative work is done by the air resistance on the ball in part a so. This is the final answer.
ABOUT AIR RESISTANCEHere on Earth, we tend to take air resistance (aka. “drag”) for granted. We just assume that when we throw a ball, launch an aircraft, deorbit a spacecraft, or fire a bullet from a gun, that the act of it traveling through our atmosphere will naturally slow it down. But what is the reason for this. Just how is air able to slow an object down, whether it is in free-fall or in flight.
Because of our reliance on air travel, our enthusiasm for space exploration, and our love of sports and making things airborne (including ourselves), understanding air resistance is key to understanding physics, and an integral part of many scientific disciplines. As part of the subdiscipline known as fluid dynamics, it applies to fields of aerodynamics, hydrodynamics, astrophysics, and nuclear physics (to name a few).
DefinitionBy definition, air resistance describes the forces that are in opposition to the relative motion of an object as it passes through the air. These drag forces act opposite to the oncoming flow velocity, thus slowing the object down. Unlike other resistance forces, drag depends directly on velocity, since it is the component of the net aerodynamic force acting opposite to the direction of the movement.
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the density of mercury is 13.5 g/ml. what is the mass in kg of mercury that fills a 0.250-l flask?
Answer:
Density of water = 1 (1 g / ml)
.25 L = 250 ml (milleters)
mass of flask = 250 ml * 1 g / ml = 250 g (water to fill flask)
Equivalent mass of Hg = 13.5 * 250 g = 3375 g = 3.375 kg
Having an issue getting images to upload but if this one works can you solve it with significant figures, please?
The magnitude of the charge on the ball is 0.72 μC.
What is the charge on the ball?The magnitude of the charge on the ball is calculated by applying Newton's second law of motion Coulomb's law as follows;
Mathematically, the formula for Newton's second law of motion and coulomb's law is given as;
F = mg
F = kq²/r²
where;
m is the mass of the ballq is the charge of the ballg is acceleration due to gravityr is the distance of the ballk is Coulomb's constantkq²/r² = mg
q² = ( mgr² ) / ( k )
q = √ ( mgr² / k )
The magnitude of the charge on the ball is calculated as follows;
q = √ ( 0.003 x 9.8 x 0.4² / 9 x 10⁹ )
q = 7.2 x 10⁻⁷ C
q = 0.72 x 10⁻⁶ C = 0.72 μC
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1. A wooden wheel of mass M, consisting of a rim with spokes, rolls down a ramp that makes an angle q with the horizontal, as shown above. The ramp exerts a force of static friction on the wheel so that the wheel rolls without
slipping.
(a)
i. On the diagram below, draw and label the forces (not components) that act on the wheel as it rolls down the ramp, which is indicated by the dashed line. To clearly indicate at which point on the wheel each force is exerted, draw each force as a distinct arrow starting on, and pointing away from, the point at which the force is exerted. The lengths of the arrows need not indicate the relative magnitudes of the
forces.
1. A wooden wheel of mass M, consisting of a rim w
ii. As the wheel rolls down the ramp, which force causes a change in the angular velocity of the wheel
with respect to its center of mass?
Briefly explain your reasoning.
(b) For this ramp angle, the force of friction exerted on the wheel is less than the maximum possible static
friction force. Instead, the magnitude of the force of static friction exerted on the wheel is 40 percent of the
magnitude of the force or force component directed opposite to the force of friction. Derive an expression
for the linear acceleration of the wheel’s center of mass in terms of M, q, and physical constants, as
appropriate.
(c) In a second experiment on the same ramp, a block of ice, also with mass M, is released from rest at the same
instant the wheel is released from rest, and from the same height. The block slides down the ramp with
negligible friction.
i. Which object, if either, reaches the bottom of the ramp with the greatest speed?
_____Wheel ______Block _____Neither; both reach the bottom with the same speed.
Briefly explain your answer, reasoning in terms of forces.
ii. Briefly explain your answer again, now reasoning in terms of energy
The block, because there is no Force of Friction (Ffr) to slow it down.
-Normal Force (Fn) is perpendicular to ramp
- Force of Friction (Ffr) is going up the ramp
- Force of Gravity (Fg=w=mg) is going straight down
Force of Friction (Ffr) because it causes a rotation, therefore making the acceleration different if friction were negligible and it were slipping down the slope.
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what makes the gravity of a black hole so strong
Answer:
matter has been squeezed into a tiny space.Explanation:A black hole is a place in space where gravity pulls so much that even light can not get out. The gravity is so strong because This can happen when a star is dying. Because no light can get out, people can't see black holes.