The output voltage of a power supply is V = Vo sin (120. t) volts. At t = 0.010 s the output voltage is 4.2 V. What is the rms voltage of the generator?
What will be an ideal response?
3.19 V
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Two bodies can be in thermal equilibrium with one another when they are at the same temperature even if they
a. absorb different quantities of thermal energy from their surroundings in equal time intervals. b. have different masses. c. have different volumes. d. have any of the properties listed above. e. have any of the properties listed above and one of them is contact with a third body at a different temperature.
The graph shows 
versus t for an object moving along straight line. What is the average velocity from t = 0 to t = 11 s?
A. 25 
B. 36
C. 30
D. 21
At the time of recombination, all of the Universe was about as hot as the core of the Sun.
Answer the following statement true (T) or false (F)
A 4.0-kg mass, initially at rest on a horizontal frictionless surface, is struck by a 2.0-kg mass moving along the x axis with a speed of 8.0 m/s. After the collision, the 2.0-kg mass has a speed of 4.0 m/s at an angle of 37° from the positive x axis. What is the speed of the 4.0-kg mass after the collision?
A. 2.0 m/s B. 2.7 m/s C. 4.9 m/s D. 2.4 m/s E. 3.6 m/s