A 20.0 cm wrench is used to generate a torque at a bolt. A force of 50 N is applied perpendicularly at the end of the wrench. The torque generated at the bolt is
A. 8.0 N•m.
B. 10 N•m.
C. 14 N•m.
D. 22 N•m.
E. 37 N•m.
B. 10 N•m.
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Galactic collisions ____
a. are very rare, since few galaxies are in clusters b. will cause stars in each galaxy to collide and trigger supernova events c. often trigger bursts of star formation d. only happen in poor clusters e. usually break large galaxy into several small ones
Suppose we have a cube containing one mole of gold and another cube containing one mole of aluminum. (The gold cube has more than 7 times the mass of the aluminum cube.) Both are initially at room temperature. Suppose that we increase the temperature of each by 10 K. Which cube’s thermal energy likely has increased more?
A. The gold cube B. The aluminum cube C. Each cube’s internal energy increase is about the same. D. One cannot say without measuring.
The theory that inflation occurred in the early universe is incompatible with the theory of relativity
Indicate whether the statement is true or false
The characteristic that distinguishes schist from slate is that schist is
A) foliated and slate is not. B) fine-grained and slate is coarse-grained. C) coarse-grained and slate is fine-grained. D) not foliated and slate is foliated.