A champion athlete can produce one horsepower (746 W) for a short period of time. The number of 16-cm-high steps a 70-kg athlete could ascend in one minute while expending one horsepower is
A. 4.
B. 7.
C. 65.
D. 408.
E. 4567.
Answer: D
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Two large equipotent surfaces are flat and parallel and separated by a relatively small distance compared to their size. One surface is at 25.0 V and the other is at 33.0 V. The surfaces are 1.25 cm apart. What is the magnitude of the electric field midway between the surfaces?
A. 25.0 V/m
B. 29.0 V/m
C. 33.0 V/m
D. 
E. 
Carbon chains are harder to assemble and disassemble than their silicon counterparts
Indicate whether the statement is true or false
Which of the following best describes why we say that light is an electromagnetic wave?
A) The passage of a light wave can cause electrically charged particles to move up and down. B) Light can be produced only by electric or magnetic appliances. C) The term electromagnetic wave arose for historical reasons, but we now know that light has nothing to do with either electricity or magnetism. D) Light is produced only when massive fields of electric and magnetic energy collide with one another.
Temperature is a measure of heat
a. True b. False Indicate whether the statement is true or false