133°F is how many degrees Celsius?
a. 31
c. 56
b. 49
d. 158
C
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For an oxide to be protective, the ratio of the volume of the oxide formed to the volume of the metal atoms that formed the oxide should be approximately _________.
Fill in the blank(s) with the appropriate word(s).
We can study how galaxies evolve because
A) we can watch as they interact in real time. B) the farther away we look, the further back in time we see. C) galaxies are transparent to visible light. D) we are really smart astronomers.
Suppose you were to try to create a proton-antiproton pair by annihilation of a very high energy photon. The proton and the anti-proton have the same masses, but opposite charges. What energy photon would be required?
A) 1.022 MeV B) 223. MeV C) 1.88 GeV D) 940. MeV E) 0.47 GeV
An 80-g aluminum calorimeter contains 380 g of water at an equilibrium temperature of 20°C. A 120-g piece of metal, initially at 352°C, is added to the calorimeter. The final temperature at equilibrium is 32°C
Assume there is no external heat exchange. The specific heats of aluminum and water are 910 J/kg•K and 4190 J/kg•K, respectively. The specific heat of the metal is closest to A) 520 J/kg ? K. B) 480 J/kg ? K. C) 390 J/kg ? K. D) 350 J/kg ? K. E) 560 J/kg ? K.