When mechanical work is done on a system, an increase normally occurs in its
A) internal energy.
B) temperature.
C) both of these
D) neither of these
Answer: C
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A. Embedded B. Streaming C. Virtual D. Open source
The Sun's surface seethes and churns with a bubbling pattern. Why?
A) We are seeing hot gas rising and cool gas falling due to the convection that occurs beneath the surface. B) The churning is an illusion created by varying radiation, as the gas on the Sun's surface is actually quite still. C) The churning gas is being stirred up by the strong solar wind. D) The Sun's surface is boiling.
A 1000-kg car experiences a net force of 9500 N while slowing down from 30 m/s to 15.9m/s How far does it travel while slowing down?
A) 31 m B) 34 m C) 41 m D) 37 m
Baryon number is conserved in all interactions
Indicate whether the statement is true or false