A sample of tendon 3.00 cm long and 4.00 mm in diameter is found to break under a minimum force of 128 N. If instead the sample had been 1
50 cm long and of uniform composition and cross-sectional area, what minimum force would have been required to break it? A) 32 N
B) 64 N
C) 128 N
D) 256 N
E) 512 N
C
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Will a blackbody at temperature T emit more photons per second with energy 0.5 kBT or with energy 1.5 kBT?
A. It will emit more photons with the lower energy. B. It will emit more photons with the higher energy. C. The number of photons emitted will be the same. D. One has no way of telling.
When is an elevator a reasonably good inertial reference frame?
A. Never, under any circumstances. B. Always, since it is attached to the surface of the earth. C. It is good except when it is changing speed. D. Other conditions (describe).
The 100 Year Starship initiative aims to devise a plan for sending a crewed spacecraft to a nearby star
A) at a cost of less than a 100 billion US dollars B) with a travel time of one century or less C) within the next century D) a hundred light years distant
Contrast the results of a collision between two spiral galaxies on their stars and their gas and dust clouds
What will be an ideal response?