The following diagrams show hypothetical results for collisions between identical balls floating in space. One ball was originally moving to the right along the dashed line before striking the other ball at rest. (The collision was not necessarily head-on.) The arrows depict the balls’ final velocities. Which outcomes are physically believable? For each case, answer “B” if the outcome is believable and “A” if it is absurd.
A. A
B. B
C. A
D. A
Physics & Space Science
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Characteristic x-rays are the result of
a. outer electron transitions. b. inner electron transitions. c. nuclear electron states. d. buckytubes.
Physics & Space Science
What is the charge on 1.0 kg of protons? (e = 1.60 × 10-19 C, mproton = 1.67 × 10-27 kg)
A) 1.0 C B) 1000 C C) 9.6 × 107 C D) 6.0 × 1026 C E) 6.0 × 1023 C
Physics & Space Science
In a two-body collision, if the kinetic energy of the system is conserved, then which of the following best describes the momentum after the collision?
a. must be less c. may also be conserved b. must also be conserved d. is doubled in value
Physics & Space Science
According to Galileo, inertia is a
A) force like any other force. B) special kind of force. C) property of all matter. D) concept opposite to force.
Physics & Space Science