If there were no air resistance and no gravity:
a. an object thrown at an angle upward would come down, but more slowly than it does on Earth.
b. an object thrown at an angle upward would eventually change direction to move at constant height, rather than up.
c. an object thrown at an angle upward would come down the same way it does on Earth.
d. an object thrown at an angle upward would slow down and stop.
e. an object thrown at an angle upward would keep going up in the same direction for ever and never come down.
e
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The electron gun in a television tube accelerates electrons (mass = 9.11 × 10^?31 kg, charge = 1.60 × 10^?19 C) from rest to 3.00 × 10^7 m/s within a distance of 2.00 cm. What electric field is required?
Two instruments produce a beat frequency of 5 Hz. If one has a frequency of 264 Hz, what could be the frequency of the other instrument?
a. 269 Hz b. 254 Hz c. 264 Hz d. 5 Hz e. 274 Hz
A 1.0-kg ball is attached to the end of a 2.5-m string to form a pendulum. This pendulum is released from rest with the string horizontal. At the lowest point in its swing when it is moving horizontally, the ball collides elastically with a 2.0-kg block initially at rest on a horizontal frictionless surface. What is the speed of the block just after the collision?
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