A 1 000-kg automobile moving with a speed of 24 m/s relative to the road collides with a 500-kg automobile initially at rest. If the two stick together, what is the velocity in m/s of the two cars after the collision according to an observer in a truck moving 10 m/s in the same direction as the moving cars?
a. 6
b. 11
c. 24
d. 26
e. 31
A
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Which of the following is not believed to be composed of quarks?
A) alpha particle B) beta particle C) proton D) neutron E) pion
A diver shines light up to the surface of a flat glass-bottomed boat at an angle of 30° relative to the normal. If the index of refraction of water and glass are 1.33 and 1.5, respectively, at what angle (in degrees) does the light leave the glass (relative to its normal)?
A. 26 B. 35 C. 42 D. 22 E. 48
A refrigerator removes heat from the freezing compartment at the rate of 20 kJ and ejects 24 kJ into the room per cycle. How much work is required in each cycle?
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Oxygen has atomic number 8. How many times must an oxygen atom be ionized to create an O+5 ion, and how many electrons will the ion have?
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