During an isothermal process, 5.0 J of heat is removed from an ideal gas. What is the change in internal energy?
A)
zero
B)
2.5 J
C)
5.0 J
D)
7.5 J
E)
10 J
A
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_______________ variable stars are useful in measuring the distance to globular clusters
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A proton is accelerated from rest through a potential difference of 2.5 kV and then moves perpendicularly through a uniform 0.60-T magnetic field. What is the radius of the resulting path?
A. 15 mm B. 12 mm C. 18 mm D. 24 mm E. 8.5 mm
One way of stating the principle of relativity is:
A) Light has the same speed for all nonaccelerated observers. B) Experiments conducted entirely within your own lab will come out differently, depending on the state of motion of the lab relative to other reference frames. C) Observers that are accelerated will see light beams move at something other than lightspeed. D) Unless you look outside, you cannot tell how fast you are going. E) The speed of light is relative to the motion of the observer, provided that the observer is not accelerated.
The second excited state for an electron in a hydrogen atom would be where n equals ______________
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