A 1000-kg automobile moving with a speed of 24 m/s collides with a 500-kg car initially at rest. If the two stick together, what is the velocity (in m/s) of the two cars after the collision relative to an automobile moving in the same direction at 15 m/s?
a. 14
b. 16
c. 24
d. 48
e. 1.0
e
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The magnetic field in a cyclotron is 0.50 T. What is the radius of the vacuum chamber for a maximum proton velocity of 
A. 0.11 m B. 1.2 m C. 0.21 m D. 0.013 m
Each halogen atom, such as chlorine, fluorine, and bromine, in Earth’s atmosphere contributes to
a. the production of carbon dioxide. b. the production of acid rain. c. the destruction of ozone over decades and centuries. d. the destruction of water in the upper atmosphere.
Consider the following statement, and explain whether or not it is sensible: It will take me light-years to complete this homework assignment
What will be an ideal response?
The first evidence for a finite, not infinite, speed of light came from observations in which
A) Galileo measured the time for light to travel to a distant mountain and back again. B) sunlight was observed just as the sun was fully eclipsed by the moon. C) Galileo reflected a light beam from rapidly rotating mirrors in a laboratory. D) the orbital time of one of Jupiter's moons was observed during two successive orbits. E) sunlight passed through a narrow slit as the sun rose at the summer solstice (longest day of the year).