Which of the following is a true "wave," as physicists define the term?
A) light
B) water flowing downhill in a mountain stream
C) ocean waves coming into a beach
D) None of the above.
E) All of the above.
A
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What action is responsible for the heating of Saturn's interior?
a. rapid rotation on its axis b. zero inclination to its axis of rotation c. convection currents of liquid hydrogen d. falling droplets of helium releasing energy e. rising magma from hot spots found on its surface
Two billiard balls having the same mass roll toward each other at the same speed. What is the net momentum of the two-ball system?
A) 0 kg?m/s B) 10 kg?m/s C) not enough information
Both conventional fossil fuel and nuclear power plants
A. contribute to the problem of acid rain. B. produce waste heat that can affect the weather or upset the ecology of rivers or lakes. C. produce carbon dioxide, which may increase global warming. D. produce hazardous waste products that must be stored in isolation for thousands of years.
Which of the following forms of energy is the greatest for a system of a comet in orbit about the Sun during perihelion (the comet's closest approach to the Sun)
1.the total mechanical energy 2.the potential energy 3.the kinetic energy 4.none of these