The metamorphosis of limestone leads to
a. marble.
b. slate.
c. schist.
d. gneiss.
a
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This x-ray image shows a loop of hot gas above the surface of the Sun. Suppose we took another photo looking at the same place 1 hour later. What would we see?
A) The loop would look about the same as it does in this photo. B) The loop would have shot much higher up above the Sun's surface. C) The loop would have collapsed back down, so we would not see it anymore. D) The loop would have turned blue as the gas became hotter.
A wall consists of 2 layers of material: brick in front of an equal thickness of wood. If the respective thermal conductivities of the brick and wood are 1.3 J/m-s-C and 0.15 J/m-s-C,
how does the temperature gradient across the wood compare to the gradient across the brick?
The amount of heat necessary to change 1 kg of a solid into a liquid at the same temperature is called the
a. entropy. b. melting point. c. latent heat of vaporization. d. latent heat of fusion.
A series RLC circuit is connected across a 240-Hz AC source, where ?Vmax = 140 V, R = 480 ?, C = 0.250 ?F, and L = 3.25 H. What is the average power delivered to this circuit?
a. 77.9 W b. 1.78 W c. 3.56 W d. 0.890 W