Iron with 0.20% carbon is a(n)
(a) Cast iron
(b) Hypereutectoid steel
(c) Hypoeutectoid steel
(d) Eutectoid steel
(c) Hypoeutectoid steel
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Consider a heavy object which is thrown straight up, reaches its highest point, and then falls back down to the ground. During what parts of the trajectory was it in "FREE FALL"? (assume here that air friction is negligible)
What will be an ideal response?
A particle confined in a rigid one-dimensional box (an infinite well) of length 17.0 fm has an energy level En = 2.0 MeV and an adjacent energy level En+1 = 37.5 MeV
What is the value of the ground state energy? (1 eV = 1.60 × 10-19 J) A) 1.50 MeV B) 13.5 MeV C) 0.500 MeV D) 4.50 MeV
The body chiefly responsible for ocean tides is the
1) Moon, 2) Sun, chiefly because 3) the Moon is closer to Earth than the sun. 4) gravitational pull by the Moon is less than that of the sun. 5) the difference between the Moon's pull on the near and far sides of Earth is appreciable.
Saturn's F ring and the rings of Uranus are similar in that
a. they are made of dark material. b. they are made of icy material. c. they are found near large moons. d. they show well defined spokes. e. they are very narrow.