An ideal gas at STP is first compressed until its volume is half the initial volume, and then it is allowed to expand until its pressure is half the initial pressure. All of this is done while holding the temperature constant
If the initial internal energy of the gas is U, the final internal energy of the gas will be A) U.
B) 2U.
C) U/2.
D) U/3.
E) U/4.
A
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Each pattern shown below would appear on a screen when monochromatic light of wavelength ? first passes through a narrow slit of width a and then strikes a screen. The darkest areas on the page represent the brightest areas on the screen. In which case does the slit have the greatest width?
a.
b.
c.
Astronomers and physicists express temperatures of the Sun and other objects on the Celsius temperature scale
Indicate whether the statement is true or false
When you draw the free-body diagram for a single object, you must sketch
1.the forces that act on the single object along with any resulting accelerations that the object experiences. 2.only the forces that act on the object. 3.the forces that act on the object and the forces that the object exerts on other objects. 4.only those forces that the single object exerts on other objects.
A car coasts down a road into a valley and then coasts back up the next hill some distance
Where has its change in velocity been greatest? At the point at which it stops while going uphill? At the bottom of the hill? As it rolls back through the bottom to the other side? Explain.