A 60-kg and a 90-kg skydiver jump from an airplane at an altitude of 6000 m, both falling in the pike position. Make some assumption on their frontal areas and calculate their terminal velocities. How long will it take for each skydiver to reach the ground (assuming the time to reach terminal velocity is small)

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.

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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

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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.

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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)

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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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.

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.

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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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.

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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When we say that the sun is a ball of plasma, we mean that the Sun consists of gas in which many or most of the atoms are ionized (missing electrons).

The Sun is composed of a plasma of hydrogen and helium atoms that are in a state of high temperature and pressure. This plasma is so hot that it is ionized, meaning that the electrons have been stripped away from the atoms.

This ionized gas is electrically charged and it is this charge that allows it to interact with the Sun's powerful magnetic field. The plasma is constantly moving and being heated by the nuclear reactions at the Sun's core. This heat is then radiated outwards in the form of light and other forms of energy. The plasma also creates powerful solar winds that can affect the Earth's atmosphere and magnetic field.

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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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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.

Here 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).

By 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 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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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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Answer:

The force that is exerted by the racket is greater than the force that is exerted by the ball. Option C

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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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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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.

The direction of the flow of energy is not specified in the first rule of thermodynamics, which explains how energy is conserved. The second law of thermodynamics describes the direction of energy flow and the spontaneity of a process.

The overall entropy of a system may only ever grow or stay constant during spontaneous processes, according to the second rule of thermodynamics.

The heat engine model is a renowned illustration of the second rule of thermodynamics. A piston is propelled by heat engines, which use a cycle of rising and falling temperatures. The quantity of work that can be produced by a heat engine's fluctuating temperatures is determined by the second law of thermodynamics.

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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.

An Expression for the force F2 using arguments based on work (do not use a torque argument) is F1 × H1 ÷ H2.

The 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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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

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

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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Yes, according to Copernicus, the sun is the center of the solar system

The Copernican Heliocentrism is an astronomical model developed by Nicolaus Copernicus and published in 1543. This model places the Sun at the center of the universe, stationary, and the Earth and other planets orbit the Sun at uniform velocities in circular orbits modified by the epicycle. Nicolaus Copernicus (1473–1543) was a mathematician and astronomer who proposed that the sun was stationary at the center of the universe and that the earth revolved around it. By placing the sun at the center, Copernicus' ideas turned those of the second-century astronomer Ptolemy upside down. Ptolemy's theory that the sun and planets orbited the earth was adopted as the orthodox model throughout Christendom.

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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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The astrometric technique looks for planets with careful measurements of a star's position in the sky.

Astrometry is the method that detects the motion of a star by making precise measurements of its position on the sky. This technique can also be used to identify planets around a star by measuring tiny changes in the star's position as it wobbles around the center of mass of the planetary system. However, the precision required to detect a planet orbiting a star using this technique is extremely difficult to achieve and for this reason only one planet has been discovered by this method, although astrometry has been used to make follow-up observations for planets detected via other methods.

Astrometric observations cannot detect a star's displacement towards or away from Earth, as this does not produce any change in the star's position in the sky. Astrometry can only detect that component of a star's wobble that moves it to a different location in the sky - i.e. perpendicular to the line of sight of the Earth-bound observer.

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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.

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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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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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.

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.

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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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.

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.

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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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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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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A baseball bat exerts a force of magnitude f on a ball. If the mass of the bat is three times the mass of the ball, the magnitude of the force of the ball on the bat is F.

This phenomenon is by Newton's third law of motion, which states that when an object exerts a force on another object, the second object exerts a force equal in magnitude to the opposite direction on the first object. Body mass doesn't matter in this case.

That way, Newton's Law is also known as the law of action-reaction. Mathematically, Newton's 3rd Law can be written in the form of the following equation.

        Faction = - Fraction (the - sign indicates the opposite direction)

Two forces are action-reaction forces if they have the same magnitude, are opposite in direction, and occur in two objects or objects that interact with each other.

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The magnitude of the charge on the ball is 0.72 μC.

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;

kq²/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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Answer:

Explanation:

F = ma = (2 kg)(9.8 m/s²) = 19.6 N

a = F/m = 25 N / 2 kg = 12.5 m/s²