The bond energy for a hydrogen molecule is
A)
1.5 eV.
B)
2.5 eV.
C)
3.5 eV.
D)
4.5 eV.
E)
5.5 eV.
D
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Which of the following does not travel at light speed?
A) light B) radio waves C) X-rays D) infrared waves E) Actually all of these travel at light speed.
An inventor has created a heat engine that extracts energy from geothermal hotspots and geysers like Old Faithful at Yellowstone National Park. She claims to turn all of the geothermal energy into work. Such a device is
A. a violation of the first law of thermodynamics. B. consistent with Clausius's statement of the second law of thermodynamics. C. a violation of Kelvin's statement of the second law of thermodynamics. D. only possible for a Carnot cycle.
A 2.15 kg lightly damped harmonic oscillator has an angular oscillation frequency of 0.261 rad/s. If the maximum displacement of occurs when t = 0.00 s, and the damping constant b is 0.74 kg/s what is the object's displacement when t = 4.01 s?
A) 0.50 m B) 0.43 m C) 0.58 m D) 0.65 m
A block of mass 5.00 kg rests on a horizontal surface where the coefficient of kinetic friction between the two is 0.200 . A string attached to the block is pulled horizontally, resulting in a 3.00 m/s2 acceleration by the block. Find the tension in the string. (g = 9.80 m/s2)
a. 0.200 N c. 19.8 N b. 9.80 N d. 24.8 N