Consider a situation where two moving objects collide, stick to each other, and move off together. The energy stored in a stretched spring is an example of gravitational potential energy
Indicate whether the statement is true or false
F
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The value of the momentum of a system is the same at a later time as at an earlier time if there are no
a. collisions between particles within the system. b. inelastic collisions between particles within the system. c. changes of momentum of individual particles within the system. d. internal forces acting between particles within the system. e. external forces acting on particles of the system.
The energy stored in a pile driver is an example of gravitational potential energy
a. True b. False Indicate whether the statement is true or false
The principal landform resulting from a stream's erosive power is its ______________-shaped valley
a. V b. W c. M d. I
The reason that we can calculate the change in entropy of a system is that
A. entropy always decreases. B. entropy always increases. C. the entropy of the universe always remains constant. D. it depends only on the properties of the initial and final equilibrium states. E. systems always follow reversible paths.