Physics

Two charged particles are accelerated through a uniform electric field and zero magnetic field, then enter a region with zero electric field and a uniform magnetic field. The particles start at rest from the same position (but at different times; they do not interact with each other). They have identical charges, but different masses. Particle 2 has a cyclotron radius 1.5 times as large as that of particle 1. Find ratio m2/m1
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Suppose you wanted to use a non-reflecting layer for radar waves to make an aircraft invisible. What would the thickness of the layer be to avoid reflecting 2 cm radar waves. (You can neglect changes of wavelength in the layer for this problem.) Would there be any problems as the aircraft turn
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What do snow melting, water freezing to ice, and water boiling into steam have incommon? *OThey involve a change in state.They involve a change in temperature.OThey involve a change in thermal energy.All of the above are true.
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A 1500kg car moves foward with 30kgm/s of momentum. What is its velocitySelect one -1470m/s0.02m/s45,000m/s-50m/s
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URGENT!! Please answerPillows ___ light- absorb- reflect- refract- All of the above
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What causes atoms to bond together?!?
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Why does current flow in a coil when a magnet is pushed in and out of the coil ?
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Two scientists decide to investigate the rate at which objects fall on different planets. They choose to use Earth and Mars as case studies. One scientist stays on Earth and the second goes to Mars. Each of them released a 2kg piece of stone at a height of 15 metres from the surface of the planet at exactly the same time. On which planet will the stone hit the ground first? Why do you think so?
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Two wires, both with current out of the page, are next to one another. The wire on the left has a current of 1 A and the wire on the right has a current of 2 A. We can say that: A. The left wire attracts the right wire and exerts twice the force as the right wire does.B. The left wire attracts the right wire and exerts half the force as the right wire does.C. The left wire attracts the right wire and exerts as much force as the right wire does.D. The left wire repels the right wire and exerts twice the force as the right wire does.E. The left wire repels the right wire and exerts half the force as the right wire does.F. The left wire repels the right wire and exerts as much force as the right wire does.
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Using the diagram below, calculate the PE and KE of the ball at the top, middle, and bottom of a drop. SHOW YOUR WORK!!Write an explanation of what would happen to the ME, PE, and KE of the ball from the top of the drop to the middle of the drop, and then at the bottom.
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Derive the equation relating the total charge Q that flows through a search coil (Conceptual Example 29.3) to the magnetic-field magnitude B. The search coil has N turns, each with area A, and the flux through the coil is decreased from its initial maximum value to zero in a time t. The resistance of the coil is R, and the total charge is Q=It, where I is the average current induced by the change in flux.
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You are a traffic accident investigator. You have arrived at the scene of an accident. Two cars of equal mass (1,000 kg each) were involved in a rear-end accident at a stop sign. Here is what you know: Car 1 approached the intersection from the top of a 25-meter hill. Car 2 was on a flat stretch of road directly in front of Car 1. At the bottom of the hill, Car 1 was going 20 m/s; Car 2 was going 30 m/s before it stopped at the stop sign. There were no skid marks left by Car 2. The collision occurred at the stop sign, where Car 2 had stopped. After the collision, both cars were moving together in the same direction at 10 m/s before slowly rolling to a stop. You must now push Car 2, using 800 N of force, 10 meters off to the side of the road so no one else gets hurt.1. What was the potential energy of Car 1 at the top of the hill? (3 points)2. What was the kinetic energy of each car before braking? (4 points)3. A. How much energy did Car 1 lose from the top to the bottom of the hill? (3 points)B. Where do you suppose that energy went? (2 points)4. How much work was done to bring Car 2 to a stop? (4 points)5. If Car 2 came to a stop in 15 seconds, how much power (in watts) did it take to stop Car 2 at the stop sign by applying force to the brakes? (3 points)6. What is the final combined momentum of the cars right after the accident? (6 points)7. Assuming that there are no other nonconservative forces involved, what impulse was given to each car during the collision? (6 points)A. Car 1 (3 points)B. Car 2 (3 points)8. How much energy did Car 1 lose in the collision? (3 points)9. How much energy did Car 2 gain in the collision? (3 points)10. Which of the two laws covered in this unit - Law of Conservation of Momentum or Law of Conservation of Energy - is obeyed in this problem? Explain your reasoning. (5 points)11. How much work did it take to move Car 2 off to the side of the road? (3 points)12. If it took you 40 seconds to move Car 2 off the road, how much power did you expend? (3 points)13. Which simple machine does a car have that helped you move Car 2? Explain. (2 points)
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Modified Newtonian dynamics(MoND)proposes that, for small accelerations, Newtons second law, F = ma, approaches the form F = ma2/a0, where a0 is a constant. (a) (10 points) Show how such a modified version of Newtons second law can lead to flat rotation curves, without the need for dark matter. (b) (10 points) Alternatively, propose a new law of gravitation to replace F = GMm/r2 at distances greater than some characteristic scale r0 so that again, you can explain the observed flat rotation curved of galaxies without dark matter.
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A man can lift a mass of 200kg onThe surface of the earth. what is the amount of mass he can lift on the surface of the moon?
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The passage helps the reader to draw conclusions about which character's perspective? Alec Alice Alec's father Alec's mother
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At t = 0, a car has a speed of 30.0 m/s. At t=6.00 s, its velocity is 12.0 m/s.What is its average acceleration during this interval? plz help...
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Hi, I need some science help ASAP. Here's the question:Vanessa pushes a box with 50 N of force. The box accelerates 2 m/s2 for 10 seconds. What is the mass of the box?5 kg20 kg25 kg100 kg
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A wave that is traveling toward an interface is called the...??
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Please have a look at the image
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6. Two positive charges, each with 6.0 x 10^-6 C, are 0.75 meters apart.What force exists between the two charges?
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While watching a movie a spaceship explodes and there is a loud bang and flash of light. What is wrong with this scene? Explain how you know using evidence and scientific reasoning from the lesson.
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Un semforo de 80N cuelga del punto medio de un cable de 30m tendido entre 2 postes. Halle la tensin en cada segmento del cable si ste tiene un pandeo que lo hace descender una distancia vertical de 1m
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What would scorch marks on fabric near bullet wound indicate?
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A potential difference of 24 V is applied to a 150-ohm resistor. How much current flows through the resistor?
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