Heat is a form of energy, and it has long been known that heat energy will naturally flow
A. from solids to liquids, but only when the solid is melting.
B. from hot to cold objects.
C. from cold to hot objects.
D. from liquids to solids, except when the solid is melting.
Answer: B
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Which energy is an energy of position?
(a) kinetic (b) heat (c) potential (d) force x time (e) watts
From the horizon to the observer's zenith is an angle of
A) 23.5 degrees for observers at the Tropics of Cancer and Capricorn. B) 30 degrees for observers at a latitude of 30 degrees north. C) 90 degrees for everyone on the Earth. D) 66.5 degrees for everyone on the Earth. E) 0.0 degrees for an observer at the Earth's north pole.
Coulomb's Law: Suppose you wanted to hold up an electron against the force of gravity by the attraction of a fixed proton some distance above it. How far above the electron would the proton have to be? (k = 1/4??0 = 9.0 × 109 N ? m2/C2, e = 1.6 × 10-19 C, mproton = 1.67 × 10-27 kg, melectron = 9.11 × 10-31 kg)
A. 1.5 m B. 2.3 m C. 3.7 m D. 4.6 m E. 5.1 m
If the magnitude of vector is less than the magnitude of vector , then the x component of is less than the x component of
Indicate whether the statement is true or false