The first chronometer was not very accurate, as it had an error rate of up to 15 minutes a day. However, it was still a major advancement in maritime navigation as it improved the accuracy of longitude determination substantially compared to the methods that were used before.
The Impact of the First Chronometer on Maritime NavigationThe invention of the first chronometer in the 18th century was a major milestone in the history of maritime navigation. The chronometer was a type of clock that was designed to be used onboard ships in order to accurately measure longitude. It was a major improvement over the methods that were used before, as it had an error rate of only 15 minutes per day. This meant that navigators could much more accurately determine their position at sea, which was critical for safe navigation.
The chronometer allowed for a much more precise determination of longitude than was previously possible. Before its invention, the best method of determining longitude was based on lunar observations, which was still highly inaccurate. With the chronometer, navigators could now determine their longitude within minutes rather than hours. This greatly increased the safety and efficiency of maritime travel.
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When entering the interstate on a short entrance ramp where there is no acceleration lane, you should:
When entering the interstate on a short entrance ramp where there is no acceleration lane, you should Speed up and enter the interstate only after you have identified a gap in traffic.
one of the major thoroughfares that make up the US system of expansive roadways that traverse states and connect numerous cities is interstate highways. The safest way to enter is to stop and wait for a significant gap in traffic if the entrance lane is too narrow to allow acceleration to highway speed. Then get on the highway and drive rapidly and such type of narrow entrance lane is called short entrance ramp.
When entering the interstate on a short entrance ramp where there is no acceleration lane, you should speed up and then enter the interstate only after you have identified a gap in traffic as you should wait for the gap between short lane to appear and then speed the vehicle.
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When entering the interstate on a short entrance ramp where there is no acceleration lane, you should Speed up and enter the interstate only after you have identified a gap in traffic.
One of the major thoroughfares that make up the US system of expansive roadways that traverse states and connect numerous cities is interstate highways. The safest way to enter is to stop and wait for a significant gap in traffic if the entrance lane is too narrow to allow acceleration to highway speed. Then get on the highway and drive rapidly and such type of narrow entrance lane is called short entrance ramp.
When entering the interstate on a short entrance ramp where there is no acceleration lane, you should speed up and then enter the interstate only after you have identified a gap in traffic as you should wait for the gap between short lane to appear and then speed the vehicle.
The question is incomplete. The complete question is 'A) Immediately enter the far-right traffic lane on the interstate and speed up to match the flow of traffic. B) Use the shoulder of the main road to get up to the speed of traffic. C) Speed up and enter the interstate only after you have identified a gap in traffic.'
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What are the 4 characteristics of a concave mirror?
Concave mirrors can create both actual and virtual pictures. Mirrors can be enlarged, shrunk, or the exact size as the item. They can just be upright (if online) or reversed (unless real); front of the glass (unless real); or behind the glass (if virtual).
What distinguishes a convex mirror?Convex mirrors are not utilized to focus light since they diverge light rays by reflecting light outward. Virtual, upright, and initially smaller than the item, the image grows to a maximum size equal to the thing as it approaches the mirror. Diverging mirrors are another name for such mirrors.
What features distinguish concave?Spherical mirrors include both concave and convex mirrors.
Property 1: The incoming ray that is perpendicular to the main axis travels through the concave mirror's focus.
Property 2: The incident light will be reflected parallel toward the major axis if it passes through the focus.
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Your brother throws you out of the house with a force of 150 N. If he did 1,759 Joules of work, how far away did you land?
The landing will be at a distance of 11.72m.
The scientific definition of work is different in many ways from its everyday meaning. The definition of work in physics reveals its relationship to energy – whenever work is done, energy is transferred.
Work is the product of the component of the force in the direction of the displacement and the magnitude of this displacement.Mathematically, the above statement is expressed as follows:
W = (F cos θ) d = F. d
Where,
W is the work done by the force.
F is the force, d is the displacement caused by force
θ is the angle between the force vector and the displacement vector
The SI unit of work is the joule (J), which is defined as the work done by a force of 1 Newton in moving an object through a distance of 1 meter in the direction of the force.
Given, Force (F) = 150N
Work (W) = 1759 Joules
Putting these values in above equation we get, d = 11.72m.
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Place the following types of em radiation in order, from lowest energy to highest energy: a) visible light; b) gamma rays; c) radio waves.
The right order of types EM radiation from lowest energy to highest energy is radio waves, visible light, and gamma rays.
According to the data, radio waves are the lowest electromagnetic radiation, with frequencies up to about 30 GHz and wavelengths greater than about 0.4 inches (10mm). The second would be visible light since its frequency is about 400 to 800 THz and wavelengths of about 0.000015 to 0.00003 inch. Gamma rays are the highest type of electromagnetic radiation because the frequencies are greater than 10^18 Hz with wavelengths of less than 4x10-9 inch.
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When a forklift raises an object, is it doing positive or negative work on the object? which type of work is the force of gravity doing on the object?.
When a forklift raises an object, it is doing positive work because the direction of motion and force are the same. The force of gravity is doing negative work on the object because it acts opposite to the direction of motion.
A forklift does positive work because the electrical energy will be converted to kinetic energy, which is needed for the forklift to raise the object. It will exert a force that acts in the same direction as the motion, which signifies positive work. However, the resultant force of the object will react on a forklift, and this causes the drag force. This will weigh the forklift downwards slightly because of much the object will weigh.
The force of gravity is doing negative work because it acts in the opposite direction of motion and force.
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guys help me pleasee. how can i calculate the weight of a book that has a mass of 400g
Answer: 25 g
Explanation:
Answer:
W = 3.92 N
Explanation:
m = 400 gr = 0,4 kg
W = m . g = 0,4 x 9.8
W = 3.92 N
A simple wheel has the form of a solid cylinder of radius r with a mass m uniformly distributed throughout its volume. The wheel is pivoted on a stationary axle through the axis of the cylinder and rotates about the axle at a constant angular speed. The wheel rotates n full revolutions in a time interval t.
The wheel rotates n full revolutions in a time interval of t. The kinetic energy K of the rotating wheel obtained is (mr²π²n²) ÷ (t²).
The equation for the rotational kinetic energy of the wheel is:
KE = (1 ÷ 2) Iω²
The angular velocity of the wheel is:
ω = (2πn) ÷ 2
The equation of the moment of inertia of a solid cylinder is:
I = (mr²) ÷ 2
Substitute the value in kinetic energy,
K = ((1 ÷ 2) × ((mr²) ÷ 2) × ((2πn) ÷ 2))
K = (mr²π²n²) ÷ (t²)
Therefore, The kinetic energy K of the rotating wheel obtained is (mr²π²n²) ÷ (t²).
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The complete question is:
A simple wheel has the form of a solid cylinder of radius r with a mass m uniformly distributed throughout its volume. The wheel is pivoted on a stationary axle through the axis of the cylinder and rotates about the axle at a constant angular speed. The wheel rotates n full revolutions in a time interval of t. What is the kinetic energy K of the rotating wheel? Answer in terms of m, r, n, t, and pi.
Part A: At which of the labeled positions does the cyclist have the most potential energy?
To solve this we must be knowing each and every concept related to potential energy. Therefore, before you start descending, you just have potential energy at the top of the slope.
What is potential energy?Potential energy is the energy stored by a thing but not yet discharged. Potential energy is frequently caused by an entity's height in a gravitational field, electric charge, and internal tensions.
Before you start descending, you just have potential energy at the top of the slope. There is not any kinetic energy because there is no motion. This indicates that the potential energy just at summit is the effort required to go up the slope.
Therefore, before you start descending, you just have potential energy at the top of the slope.
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What is the porosity of the gravel sample?(the sediment volume for each sample is 400ml.) a. 23.75% b. 28.75% c. 55.75% d. 81.75% please select the best answer from the choices provided a b c d
d. 81.75% is the porosity of the gravel sample.
How porous is the sediment in the sand sample?According to an examination of published data, the average sand porosity for packed, natural (in situ), and loose packing conditions, respectively, over a range of sorting coefficients and grain sizes, was found to be 37.7%, 42.3%, and 46.3%.
Clay is the least permeable sediment while having the greatest pores. Water movement is typically impeded by clay, which functions as an aquitard. The porous and permeable qualities of gravel and sand make them suitable materials for aquifers. The most permeable substance is gravel.
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Question 11 of 20
Edward runs with a speed of 3m/s. How long would it take him to run 1.2km? Give your answer in
minutes to three significant figures.
Enter your answer as a number
minutes
The time taken by Edward is 6.66 minutes.
Speed is measured as the ratio of distance to the time in which the distance was covered. Speed is a scalar quantity as it has only direction and no magnitude.Distance is the total movement of an object without any regard to direction. We can define distance as to how much ground an object has covered despite its starting or ending point.Time can be defined as the dimension based on which the evolution of any system takes place. It can be measured in terms of seconds, minutes, hours, days, weeks, months, and years.The formula for speed distance time is mathematically given as:
Speed = Distance/Time
If any of the two values among speed, distance and time are given, we can use this formula and find the unknown quantity.
Given, speed = 3m/s
distance = 1.2Km = 1200m
So, time = 400sec = 400/60 min = 6.66 minutes
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The speed of an airplane is 300 mi/h relative to the air. The wind is blowing due north with a speed of 30 mi/h. In what direction should the airplane head in order to arrive at a point due west of its location
The plane must fly at angle of 5.739° from due west towards south to reach the desired point in due west
The angle θ of direction of airplane from the due west towards south is given by using property of vector right triangle as follows
sin θ = 30/300
θ = sin^-1 (1/10)
= 5.739°
Hence the plane must fly at angle of 5.739° from due west towards south to reach the desired point in due west.
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An 800-n box is pushed up an inclined plane. The plane is 4. 0 m long and 2. 0 m high. If it requires 3200 j of work to get the box to the top of the plane, what was the magnitude of the average friction force on the box?.
The magnitude of the average friction force on the box is calculated as 400 N
What is energy conservation?Energy conservation is the principle by which total energy remains constant in a system that is not subjected to external influence.
Given, length of the plane, d = 4 m
and height of the plane, h = 2 m
work done , w = 3200 J
kinetic energy on the top, KE = 0
Potential energy on the top,
P.E = weight x height
= 800 *2
So, P.E = 1600 J
Now, total work = K.E + P.E + W (friction)
So, W (friction) = 3200 - 1600
W (friction) = 1600 J
As we know, W (friction) = F (friction) x d
F (friction) = 1600 / 4
Now, F (friction) = 400 N
Hence, the magnitude of average friction force on box is 400 N.
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An asphalt surface absorbs (less/more) solar energy than a cement surface. This difference is chiefly due to differences in (texture/moisture/color).
An asphalt surface absorbs more solar energy than a cement surface. This difference is chiefly due to differences in color.
What is solar energy?Solar energy is the radiant light and heat from the Sun.
Solar energy is very useful for energy generation and is captured by a variety of technologies, including solar architecture, solar thermal energy, and solar power to produce electricity.
Solar energy released by the Sun gets to the earth by means of radiation.
The ability of different substances to absorb radiation from the Sun differs according to the nature of the material.
Dark and dull surfaces absorb radiation from the Sun more readily than shiny and bright surfaces. Hence, dark surfaces are better radiators of solar energy.
For example, an asphalt surface is dark and dull compared to a cement surface which is shiny. Hence asphalt surfaces absorb more radiation than cement surfaces.
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Ax is positive if is directed ______; Ay is positive if is directed ______. A. Right, up. B. Left, up. C. Right, down. D. Left, down
Ax is positive if is directed right. Ay is positive if is directed up.
Acceleration is nothing but the rate of change of velocity of an object. It is a vector quantity.
If the acceleration and velocity are pointing in the same direction, the item will be travelling more quickly. The object will also slow down if the acceleration is pointing in the opposite direction as the velocity.
When an acceleration vector is resolved into two components, we get Ax along x-direction and Ay along y- direction.
Assuming the coordinate system, we know the right side of the coordinate system is positive and to the left it is negative. Along the y-direction, acceleration is positive when going upwards and negative while going downwards on coordinate axes.
Thus, Ax is positive if it is directed right and Ay is positive if it is directed up.
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The molar mass of propane is 44 grams per mole. How many moles is 11 grams of propane?.
11 grams of propane is equal to 0.25 moles of propane.
What is molar mass?The ratio between the mass and the substance content (measured in moles) of any sample of a chemical compound is known as the molar mass in chemistry. The molar mass of a substance is a bulk attribute rather than a molecular one. The compound's molar mass is an average over numerous samples, which frequently have different masses because of isotopes.
A terrestrial average and a function of the relative abundance of the isotopes of the constituent atoms on Earth, the molar mass is most frequently calculated using the standard atomic weights.
Given parameters:
Molar mass of propane is 44 grams.
Mass of propane is = 11 grams.
Hence, 11 grams of propane = ( 11/44) moles of propene
= 1/4 moles of propane
= 0.25 moles of propane.
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the graph shows that galaxies with high speeds as measured from earth are __________.
"The graph shows that galaxies with high speeds as measured from earth are farther away from Earth and are moving faster than galaxies closer to us."
Hubble calculated the velocities of galaxies in relation to their separation from Earth using the red shift. A graph created from the data displayed a straight line passing through the origin.
This demonstrates that a galaxy's velocity and separation from Earth are both linearly related. NASA began developing the Hubble Space Telescope (HST) in the 1970 . It was finally launched in 1990. HST is still in operating today, providing us with invaluable data and stunning views of deep space of course, from American astronomer Edwin Hubble.
Edwin Hubble made important advances in science. He noticed a shift in the galaxies' light frequencies and offered important proof of the recessional velocity.
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The Moon is considered a satellite since it orbits the Earth. Explain how the Moon is kept in a circular path. What is the source of centripetal force and in what direction does it point?
Answer:
If this help please set brainliest.
The Moon is kept in a circular path around the Earth due to the force of gravity acting on it. The force of gravity is a type of centripetal force, which is the force that acts on an object moving in a circular path and is directed towards the center of the circle. In the case of the Moon, the Earth is the source of the gravitational force, and it is constantly pulling the Moon towards it. As the Moon travels in its elliptical orbit around the Earth, the Earth's gravitational force continually changes the direction of the Moon's velocity, causing it to follow a curved path rather than a straight line. This results in the Moon being kept in a circular orbit around the Earth.
What did Harrison realize after getting a watch made for himself?
Harrison realized that the watch had the potential to be the timekeeping solution to the longitude problem with a few tweaks.
Realizing this led to the creation of H4, which has a diameter of just 13 centimeters. One of the upgrades Harrison made was a larger than usual balance wheel, which is a feature of most pocket watches. It had a greater frequency, pulsing five times per second, or 18,000 times each hour. The watch had a tiny remontoir and a revised version of Harrison's temperature compensation from H3.
The only issue, if you can even call it that, was that H4 needed oiling. However, Harrison used a creative approach to reducing friction by installing jeweled bearings at various points.
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how much work (in kj) must be done to stop a 1020 kg car traveling at 112 km/h? (your answer should be negative.)
m = 1000 kg, v = 100 km/h, which equals 100/3.6 m/s or 27.78 m/s. IF a 1020 kg car going at 112 km/h needs to be stopped, work (in kj) energy must be used.
Which nine types of energy are there?Thermal energy, radiant energy, chemical energy, nuclear energy, electrical energy, motion energy, sound energy, elastic energy, and gravitational energy are among the several types of energy.
Energy formula: What is it?Albert Einstein came up with the equation, generally written as E = mc2, which states that if a body's energy changes by an amount E (in any form), its mass (m) changes by an amount equal to E/c2.
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Over time, what is the net effect of the star-gas-star cycle in the Milky Way?
A) The gas of the interstellar medium is continually depleted in elements heavier than helium.
B) The total mass in the galaxy's interstellar medium is gradually reduced, and the remaining gas is continually enriched in heavy elements.
C) There is no net effect to the cycle. Mass in the interstellar medium lost to star formation is exactly replaced by stellar winds and supernova explosions.
The interstellar medium of the galaxy steadily loses mass as the remaining gas is continuously enriched in heavy elements.
Where in the Milky Way is the Earth?The Milky Way's outer edge and the Earth are both around halfway there. From Earth, light travels 25,000 light-years to the galactic center. (The distance light travels in a year is measured in light-years.)
The Milky Way is close to Earth.The Milky Way, the second-largest galaxy in the Local Group, is where Earth is located. Large spiral galaxy known as the Milky Way. The Milky Way's Orion Arm, which is roughly two-thirds of the way out from the galaxy's core, is where Earth is situated.
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The energy of a photon that has a frequency of 1.821 × 1016 s-1 is ________ J. a. 5.44 × 10-18 b. 5.46 × 10-24 c. 1.99 × 10-25 d. 1.21 × 10-17 e. 3.49 × 10-48
The massless components of light are known as photons. They are the energy particles that make up the electromagnetic spectrum. A photon with a frequency of 1.821 ×10^16 s-1 has the energy of 1.21x[tex]10^{-17}[/tex]J.
The form of energy can be changed via a variety of techniques. Examples of equipment that can produce usable mechanical or electrical energy include a wide range of fuel-burning heat engines, generators, batteries, fuel cells, and magnetohydrodynamic systems.
Energy = hv
with,
h = Planck's constant
Planck's constant is the physical constant in electromagnetism's quantum theory that connects a photon's energy to its matching frequency. measured in terms of eV in the MKS system and J.s in the SI as its units of representation.
v = 1.821 x [tex]10^{16}[/tex]
we get,
energy = 6.626 x [tex]10^{-34}[/tex] x 1.821 x [tex]10^{16}[/tex]
energy= 1.21 x [tex]10^{-17}[/tex] J
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A projectile is launched with an initial speed of 12 m/s. At its highest point its speed is 6 m/s.
A projectile is launched with an initial speed of 12 m/s. At its highest point its speed is 6 m/s and the launch angle of the projectile is 60 degrees.
Given,
Vo = 12m/seg
Vx= 6 m/seg
α=?
Vx = Vox = 6 m/seg
Vox = Vo*cosα
Cosα = Vox/Vo
Cos α = 6m/seg/ 12 m/seg
Cos α = 0.5
α = cos⁻¹ ( 0.5 )
α = 60º
An object that is “projected” or thrown, which has no capacity for self-propulsion. For low speed objects with reasonable mass, e.g. a shot put, or a baseball, tennis ball or golf ball tossed softly across a room, the ideal projectile model “fits” relatively well.
For high speed objects, e.g. a hit or thrown baseball, a well-hit golf ball or tennis ball, etc., drag and other forces are significant and our ideal model is not accurate. For example, a well-hit home run, by ideal theory, will travel nearly 750 ft. In reality it only travels around 450 ft—a significant difference.
If the only force is weight, then the x velocity stays constant and the y velocity changes with time and position : If the only force is weight, then the x velocity stays constant (ax = 0). The y velocity changes with time and position (y acceleration ay = -g).
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is god real why or why not and what proof to back that up?
The concept of "God" means different things to different people, so it's difficult to provide a definitive answer to this question. Some people believe in a specific deity or deities, while others believe in a more abstract or universal concept of divinity. Still others do not believe in any kind of higher power at all. There is no single piece of evidence that can definitively prove or disprove the existence of God, as people's beliefs about God are often based on faith, personal experiences, and philosophical arguments. Ultimately, the question of whether God exists is a matter of personal belief and interpretation.
A 12 kg box is placed on the rough Surface. If a force of 20N applied at 30° to the horizontal can't move the box, Calculate the frictional Force.
The frictional force is 17.32 N.
Calculating the frictional force, we can use the equation:friction = coefficient of friction * normal force
Since the box is not moving, the frictional force must be equal to the force applied to the box.
Recall, force applied is 20 N at an angle of 30 degrees to the horizontal. We can break this force into its horizontal and vertical components using trigonometry:
horizontal force = 20 N * cos(30) = 17.32 N
vertical force = 20 N * sin(30) = 10 N
The normal force is equal to the weight of the box, which can be calculated as:
normal force = weight of box
= 12 kg * 9.8 m/s²
normal force = 117.6 N
Now we can use these values to calculate the coefficient of friction:
coefficient of friction = friction / normal force
friction = horizontal force
= 17.32 N
Coefficient of friction = 17.32 N
117.6 N
Coefficient of friction = 0.147
Hence, the frictional force is 0.147 * 117.6 N
= 17.32 N
This is the same as the horizontal component of the force applied to the box.
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in a three-wire system, how large should the neutral wire be when compared with the hot wires?
In a three-wire system, neutral wire should be the same size as the phase conductors.
What is neutral wire?In alternating current electrical systems, the circuit conductors ground and neutral are employed. The neutral circuit is often connected to ground, while the ground circuit is connected to the earth.
Ground and neutral are closely related because the neutral point of an electrical supply system is frequently connected to earth's surface.
Under specific circumstances, a conductor that is used to connect to the system neutral can also be used to earth (or ground) machinery and buildings.
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The dense core of Earth is thought to consist predominantly of ________.
a. copper
b. nickel
c. lead
d. iron
Option d is Correct. There is a theory that iron makes up a sizable portion of the Earth's thick core.
The outer core is made of liquid iron and nickel and is around 1,367 miles (2,200 km) thick. The outer core's temperature ranges from 8,132 to 9,932 degrees Fahrenheit (4,500 degrees C and 5,500 degrees C). The most common material used to construct earthquake-resistant buildings is steel, which is necessary for developing a structure that can withstand seismic waves.
The World Steel Association claims that because ductile structures disperse seismic wave energy, they are safer. The Earth's inner core contains even more metal than the outer core. Both are primarily comprised of iron with a small amount of nickel. However, lighter elements like oxygen, carbon, and silicon are also assumed to be present in small amounts in the iron.
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In a novel from 1866 the author describes a spaceship that is blasted out of a cannon with a speed of about 1.20×104 m/s . The spaceship is approximately 274 m long, but part of it is packed with gunpowder, so it accelerates over a distance of only 211m.
What was the acceleration (in m/s2 ) experienced by the occupants of the spaceship during launch? (Though the novel’s author realized that the “travelers would … encounter a violent recoil,” he probably didn’t know that people generally lose consciousness if they experience accelerations greater than about 7g∼70m/s2. )
Answer:341232 m/s^2
Explanation: you are given velocity, 1.20x10^4
distance, 211m (the 274m don't matter here)
with this information, you use the 3rd kinematic equation, vf^2-vi^2=2a(xf-xi)
vf and vi can just combine to become V (same with x)
divide ay on both sides to make a stay by itself
you are left with a=V^2/2x
plugin, 1.20x10^4/2x211
put it through a calculator and you get 341232 m/s^2
and I'm assuming you are doing MasterPhysics since I just did mine there so the answer for you is either 340000 m/s^2 or 3.4x10^5 m/s^2
Complete these nuclear reactions with the particle that is emitted.
2 i H longrightarrow 1/i * H + boxed beta
29 ^ 61 Cu longrightarrow 30 ^ 61 Zn+ boxed r
84 ^ 210 Po 82 ^ 206 Pb+ boxed p
Has a proton and a neutron. has no neutrons and only one proton. Consequently, a neutron will be the additional particle on the product side.
What kind of particle does this nuclear process produce?The proton stays in the nucleus while the electron is released as a particle, increasing the atomic number without changing the mass number.
With an example, what is nuclear reaction?Several instances include: Fusion processes produce extra particles (often protons or neutrons) after the joining of two light nuclei to create a heavier one. Spallation occurs when a particle strikes a nucleus with enough energy and momentum to break it into numerous little fragments or knock off a few large ones.
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(b) You have 50.0 m3
of an ideal gas at 1000.0 Pa and heat the gas until it expands to a volume of 300.0 m3
. How
much work did the gas do? [4]
The amount of work done by the ideal gas is 2475J.
How to calculate work done?The magnitude of the work done when a gas expands is therefore equal to the product of the pressure of the gas times the change in the volume of the gas.
w=−PΔV
The negative sign associated with the above equation indicates that the system loses energy. If the volume increases at constant pressure (ΔV > 0), the work done by the system is negative, indicating that a system has lost energy by performing work on its surroundings.
According to this question, an ideal gas initially at 50.0m³ at 1000.0 Pa expands to a volume of 300.0 m³ after heating. The work done can be calculated as follows:
W = -P∆V
W = - (0.0099 × {300000L - 50000L)
W = - (0.0099 × 250000)
W = 2475J
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How does the marine chronometer work?
The marine chronometer work by calculating the precision timepiece that is brough on a ship and implied in the determination of the ship's coordinate by celestial navigation. The invention of marine chronometer was a revolution in the age of sail.
Why was the marine chronometer important?
The Marine chronometer was important to the ship because of its accuracy in describing their longitude which is the important information to the navigator. Marine chronometer was invented by english man name John Harrison who is work as carpenter and clockmaker in the age of sail in 1761. The invention of marine chronometer is drastically increased the safety and precision are travel by the sea.
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