Which of the following represents a physical change?
A) stretching a silver wire
B) tarnishing of silver
C) both a and b
D) neither a nor b
A
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Dean plays with a popular swinging-balls. If two balls are dropped into the array and one ball pops out with twice the speed, this would violate the conservation of
A. momentum. B. energy. C. both of these D. none of the above
The scientist who espoused the relationship E ~ f was
A. Albert Einstein. B. Isaac Newton. C. Thomas Young. D. all of the above
Neptune was discovered by irregularities in
A) Jupiter. B) Saturn. C) Uranus. D) Pluto. E) Earth.
The relationship between kinetic energy and potential energy is
A) one must have potential energy before kinetic energy can be realized. B) kinetic energy is proportional to the potential energy. C) potential energy is the storage state of kinetic energy. D) in practice, all of a potential energy source is never fully transformed to usable kinetic energy. E) All of the above are true.