Which of the following stick structures could describe pentane (C5H12)?
A) a
B) b
C) c
D) d
E) none of the above
Answer: A
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A picture window in a house is 3 feet high by 5 feet long. If the window is 50ºF and the outside air temperature is -10ºF, estimate the heat transfer by natural convection from the window.
What will be an ideal response?
In the accompanying figure, which region represents approximately 80 percent of normal stars? Note: (C) represents the entire main sequence while (D) and (E) represent only small parts of the main sequence.
A vertical tube one meter long is open at the top. It is filled with 75 cm of water. If the velocity of sound is 344 m/s, what will the fundamental resonant frequency be (in Hz)?
A. 3.4 B. 172 C. 344 D. 1.7 E. 688
Which of the following methods describes the transit method for detecting extrasolar planets?
A) regular changes in the positions of the parent stars with respect to more distant stars as they move across the sky B) detection of Doppler shifts in the spectra of the parent stars C) detection of brightness changes in a star as a planet passes in front of it D) detection of reflected starlight