Power is defined as the _________________ is done.
A) Amount of work which
B) Angle at which
C) Direction at which work
D) The rate at which work.
Answer: D) The rate at which work.
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A 1.25-kg ball begins rolling from rest with constant angular acceleration down a hill. If it takes 3.60 s for it to make the first complete revolution, how long will it take to make the next complete revolution?
What will be an ideal response?
A carbon dioxide laser emits photons of 10.6 ?m wavelength. How many photons per second are emitted by a 10.0 kW CO2 laser?
a. 
b. 
c. 
d. 
e. 
A boat with mass 950 kg is heading into the harbor at a speed of 10.0 m/s. How much work is required to slow the boat to 1.0 m/s?
a. 4.8E+4 J b. 9.4E+4 J c. 4.7E+4 J d. 2.3E+4 J
____ is the separation of material in a newly formed planet or asteroid according to density. This happens when the object becomes molten
a. Accretion b. Differentiation c. Condensation d. Outgassing e. Sublimation