Which of the following is not a unit of power?
a. ft • lb/s
b. N • m
c. J/s
d. watt
b
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The bluer the light, the ____ each photon contains
a. more energy b. less energy c. less speed d. more speed e. none of the above
If the spectrum of a sunspot shows that it has a maximum intensity at 650 nm, what is the temperature of the sunspot?
a. 650 K b. 5000 K c. 1950 K d. 4500 K e. 10,000 K
A uniform hollow spherical ball of mass 1.75 kg and radius 40.0 cm rolls without slipping up a ramp that rises at 30.0° above the horizontal. The speed of the ball at the base of the ramp is 2.63 m/s
While the ball is moving up the ramp, find (a) the acceleration (magnitude and direction) of its center of mass and (b) the friction force (magnitude and direction) acting on it due to the surface of the ramp.
Power: A series circuit has a 100-? resistor, 2.00-mH inductor and a 4.00-?F capacitor connected across a 120-V rms ac source at 1000/? Hz. What is the power dissipated by the circuit?
A. 184 W B. 18.6 W C. 58.4 W D. 91.8 W E. 180 W