Lab: Magnetic and Electric Fields — Unit test Answers
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The chart shows masses and velocities of four objects.
A
W, X, Y, ZB
Z, Y, X, WC
Z, X, W, YD
Y, W, X, Z22
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Two carts collide and bounce apart. Cart 1 had a momentum of –6 kg • m/s before the collision. Cart 2 had a momentum of 10 kg • m/s before the collision.
A
–16 kg • m/sB
–10 kg • m/sC
4 kg • m/sD
10 kg • m/s23
Joe follows the procedure below to make a compass.1. Move a magnet from the top of a needle to its point fifty times.2. Lay the needle on a cork that is floating in a bowl of water.3. Observe the direction that the needle points.
A
to give the needle an electric chargeB
to make the needle sharperC
to magnetize the needleD
to flatten the side of the needle24
Jolie builds a model of a maglev train. She uses disc magnets to levitate the train. A disc magnet has its north and south poles on its faces, as shown.
A
flat, so that the north pole of each magnet on the train points up and the north pole of each magnet on the track points upB
flat, so that the north pole of the magnets on the train point up and the north poles of the magnets on the track point downC
on edge, so that the north poles of the magnets on the train point to the front and the north poles of the magnets on the track point toward the rearD
on edge, so that the north pole of each magnet on the train and on the track point toward the rear of the train25
A ball is thrown forward at 5 m/s.
A
The ball would follow a curved path on Earth but a straight path on the moon.B
The ball would follow the same curved path on Earth as on the moon.C
The ball would curve down more sharply on Earth than on the moon.D
The ball would curve down on Earth but curve up on the moon.Did you find these answers helpful?
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