Whether one object is warmer than another object has most to do with molecular
A) kinetic energy.
B) potential energy.
C) masses.
Answer: A
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Wire A and Wire B are each carrying the same current. If the diameter of Wire A is half that of Wire B, how does the drift velocity vdA in Wire A compare to that in Wire B?
a. vdA = 4 vdB c. vdA = vdB /2 b. vdA = 2 vdB d. vdA = vdB /4
Engine oil at 100ºF passes through a 1/8 inch ID tube at 50 ft/min. Estimate the heat transfer to the oil per unit area of the tube if the inside surface temperature of the tube is 150ºF.
What will be an ideal response?
When a nucleus of U-238 absorbs a neutron and becomes U-239, a beta emission, then another beta emission results in
A) Th-239. B) Pa-239. C) U-235. D) Pu-239. E) Pb-206.
Pressure: A brick weighs 50.0 N, and measures 30.0 cm × 10.0 cm × 4.00 cm. What is the maximum pressure it can exert on a horizontal surface due to its weight?
A. 1.25 Pa B. 12.5 Pa C. 1.25 kPa D. 12.5 kPa