Electric generating plants are usually rated in "megawatts". This is a unit of
A) force.
B) power.
C) energy.
D) both energy and work.
E) work.
B
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Determine the expected temperature drop at the contact between two 304 stainless steel parts if the overall temperature drop across the two parts is 100ºC.
What will be an ideal response?
The Ptolemaic model of the universe:
A) explained and predicted the motions of the planets with deferents and epicycles. B) is the basis of our modern cosmology. C) could not account for the stellar parallax observed by Hipparchus. D) describes the orbits of the planets as being ellipses, not circles. E) always kept Mars and Mercury between the Earth and Sun.
You are trying to cross a river that flows due south with a strong current. You start out in your motorboat on the east bank desiring to reach the west bank directly west from your starting point. You should head your motorboat
A) due west. B) due north. C) due south. D) in a southwesterly direction. E) in a northwesterly direction.
A beam of light of wavelength 674 nm is incident along the normal to two closely spaced parallel glass plates. For what air gap separation between the plates will the transmitted beam be of maximum intensity? (1 nm = 10?9 m)
a. 169 nm b. 674 nm c. 337 nm d. 843 nm e. 506 nm