Jill does twice as much work as Jack does and in half the time. Jill's power output is
A) the same as Jack's power output.
B) one-fourth as much as Jack's power output.
C) one-half as much as Jack's power output.
D) twice Jack's power output.
E) four times Jack's power output.
E
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Colliding plates can generate _____________________ ranges
Fill in the blank(s) with correct word
When an electron in an atom is excited from a lower energy level to a higher one, a ______________ is ______________
a. proton; absorbed b. proton; emitted c. photon; absorbed d. photon; emitted
A 1.15-kg grinding wheel 22.0 cm in diameter is spinning counterclockwise at a rate of 20.0 revolutions per second
When the power to the grinder is turned off, the grinding wheel slows with constant angular acceleration and takes 80.0 s to come to a rest. (a) What was the angular acceleration (in rad/s2 ) of the grinding wheel as it came to rest if we take a counterclockwise rotation as positive? (b) How many revolutions did the wheel make during the time it was coming to rest?
Power: A battery is rated such that it provides 1.0 mW of power at 9.0 V when fully charged. How much current can it deliver?
A. 0.11 mA B. 81 kA C. 0.33 mA D. 9.0 kA