Where does a 1-solar-mass protostar appear on an H-R diagram?
A) to the right of the main sequence, and lower down than the Sun
B) to the right of the main sequence, and higher up than the Sun
C) to the left of the main sequence, and higher up than the Sun
D) Nowhere—only stars that have fusion in their cores can be shown on H-R diagrams.
B
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Buoyancy: A 50-cm3 block of wood is floating on water, and a 50-cm3 chunk of iron is totally submerged in the water. Which one has the greater buoyant force on it?
A. the wood B. the iron C. Both have the same buoyant force. D. It cannot be determined without knowing their densities.
A four dimensional image of a coffee table is depicted in a
A) tesseract. B) video. C) photograph. D) hologram.
Characteristics of Waves: Which one of the curves shown in the figure best represents the variation of wave speed v as a function of tension for transverse waves on a stretched string?
A. A B. B C. C D. D E. E
Solar neutrinos take a little more than eight hours to get from the Sun's core to Earth
Indicate whether the statement is true or false