An electric motor on an airplane operates on 24 volts and draws a current of 15 amperes. (a) What is the power consumption of the motor? (b) How much energy does the motor use during a 2 hour flight?
(a) 360 watts, (b) 2,592,000 J
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A quantity of a monatomic ideal gas expands to four times the volume while maintaining the same pressure. If the internal energy of the gas were U0 before the expansion, what is it after the expansion?
a. U0 b. 2U0 c. 4U0 d. The change in temperature must also be known to answer this question.
Photon Energy: At what rate are photons emitted by a 50.0-W sodium vapor lamp if it is producing monochromatic light of wavelength 589 nm? (c = 3.00 × 108 m/s, h = 6.626 × 10-34 J ? s)
What will be an ideal response?
Compared to its rotational axis, Jupiter's magnetic field:
A) is exactly in alignment. B) lies about 10 degrees off, much like our own rotation and magnetic field. C) is tilted about 23.5 degrees, much like our own axial tilt. D) is tilted 98 degrees, much like the case of Uranus. E) has yet to be detected.
A steel ball with a diameter of 10 cm is subjected to a pressure that causes the volume of the ball to shrink by 0.01%. The bulk modulus for steel is 
What is the pressure?
a. 
b. 
c. 
d. 
e. 