The melting temperature of an object is usually
A. equal to its freezing point
B. higher than the freezing point
C. lower than the freezing point
D. equal to the boiling point
Answer: A. equal to its freezing point
You might also like to view...
A hollow circular post ABC (see figure) supports a load P1 5 16 kN actat the top. A second load P2 is uniformly distributed around the cap plate at B. The diameters and thicknesses of the upper and lower parts of the post are dAB 5 30 mm, tAB 5 12 mm, dBC 5 60 mm, and tBC 5 9 mm, respectively. The lower part of the post must have the same compressive stress as the upper part. The required magnitude of the load P2 is approximately:
(A) 18 kN
(B) 22 kN
(C) 28 kN
(D) 46 kN
In the U.S. AC line voltage oscillates at a frequency of
a. 50 Hz c. 120 Hz b. 60 Hz d. none of the above
Case-control studies that attempt to determine which of the following are especially subject to recall bias?
What will be an ideal response?
If the velocity of a non-relativistic object is doubled, its energy is quadrupled. This is strictly true only for very low velocities. At what velocity is it the case that a doubling of velocity results in a doubling of energy?
A. 0.45c B. 0.33c C. 0.11c D. 0.20c E. 0.50c