Average speed multiplied by time gives
a. average acceleration.
b. displacement.
c. instantaneous speed.
d. distance.
d
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You are asked to design a metal alloy for a high temperature application. What type of metal alloy phase diagrams should you consider first for this application?
(a) Continuous solid solution (b) Eutectic (c) Compound formation (d) Peritectic
A meteor is
A) an irregularly shaped body, mostly found orbiting between Mars and Jupiter. B) a chunk of space debris orbiting the Earth. C) a chunk of space debris that has struck the ground. D) an icy body with a long tail extending from it. E) a streak of light in the atmosphere.
Melanie says that when a diver enters an underwater cave of height y, the pressure on her is no greater than ?Wgy. Rosalind says that if the bottom of the cave is a distance Y below the water surface, the pressure on the soles of the diver's feet can reach ?WgY. Which one, if either, is correct? (The density of water is ?W.)
a. Melanie, because the roof of the cave absorbs the water pressure from above. b. Melanie, because only the fluid directly above any volume of the fluid can contribute to the pressure on that volume. c. Rosalind, because a fluid exerts equal pressure in all directions at a given depth. d. Rosalind, because the pressure also depends on ?c, density of the material above the cave roof, so that p = ?cg(Y ? y) + ?Wgy. e. Melanie, because the pressure equals p = ?WgH ? ?cg(H ? h).
Snell's Law: Light enters air from water. The angle of refraction will be
A. greater than the angle of incidence. B. equal to the angle of incidence. C. less than the angle of incidence.