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There are 2 spaceships, A and B, that approach the earth from opposite directions. Now according to an observer on spaceship A, she approaches the earth at 0.7c. According to an observer on spaceship B, he approaches the earth at 0.85c. What will be the speed of spaceship A according to an observer on spaceship B? Does an observer on spaceship A measure a different or same value for the speed of spaceship B?
A uniform magnetic field B is perpendicular to the plane of rotation. What is the potential difference between the ends of the bar
q1. a 51-kg person on skis starts from rest down a hill sloped at 32deg from the horizontal. the coefficient of
The .50 kg box shown below is sliding with an unknown initial velocity before it slides down the incline and then collides with a mass less spring of spring constant 4.0 N/m, what was the initial velocity of the box
A factory worker moves a 25.0 crate a distance of 4.00 along a level floor at constant velocity by pushing horizontally on it. What is the net work done on the crate
A beam of light traveling in a block of glass (n=1.60) is incident on the top surface at an angle of 55° with respect to the normal. What is the maximum possible index of refraction of the oil
A circular loop of wire is in the plane of the paper. The south pole of a bar magnet is being moved from a position in front of the paper in a direction away from the center of the loop. Which is the direction of the induced current in the loop?
A car travels at a constant velocity 30im/s for 20km, then it travels at 40im/s for the next 20km and, finally at 0im/s for the last 20km. Find the Average velocity and speed for the entire trip.
Two capacitors, one 17.5 ?F and the other 12.2 ?F are connected in series across a 15 V battery. What is the charge stored on the 12.2 ?F capacitor
A 1.60m cylindrical rod of diameter 0.450cm is connected to a power supply that maintains a constant potential difference of 15.0V across its ends, Find the resistivity and for the material of the rod at 20 ?C
A cannon fires a cannonball from the top of a wall at a speed of 23.49 m/s and an angle of 30.95 degrees from the horizontal. What is the horizontal distance from the wall where the fired cannonball hits the ground
A small plastic sphere with a charge of -5.0 nC is near another small plastic sphere with a charge of -15 nC, what is the distance between the spheres
The time constant of an RL circuit with L = 25 mH is five times the time constant of an RC circuit with C = 40 µF. What is the time constant of the RL circuit
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