Motion necessarily involves
a. a change in velocity.
b. a change in speed.
c. a change in direction.
d. a change in position.
e. all of these
d
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What is the potential difference VB?VA when I = 1.5 A in the circuit segment below?
?
?
A. +22 V B. ?22 V C. ?38 V D. +38 V E. +2.0 V
How much energy does a 100-watt light bulb use in 1 hour? Express your answer in (a) joules and in (b) kilowatt-hours. (c) Also find how much money it costs if electricity sells for 10 cents per kW-h
A 0.600-kg piece of metal X is heated to 100°C and placed in an aluminum can of mass 0.200-kg which contains 0.500 kg of water initially at 17.3°C
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An amount of water forms a single hexagonally symmetric snowflake. Elsewhere the same amount of water is a droplet of liquid water. Which state has higher entropy?
A. The solid water, since it has a tight restriction to hexagonal symmetry B. The droplet of liquid water, since it is more unruly and can adopt almost any shape C. Their entropy levels are the same, since they are actually the same amount of H2O, just different phases