RMS and Peak Quantities: American power plants usually supply 120 V ac.(a) At what frequency is this voltage supplied?(b) What is the maximum voltage?
What will be an ideal response?
(a) 60 Hz (b) 170 V (120 V is the rms voltage)
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Significant Figures: The number of significant figures in 0.040 is
A. one. B. two. C. three. D. four.
Carnot Engine: A Carnot cycle consists of
A. two adiabats and two isobars. B. two isobars and two isotherms. C. four isotherms. D. two adiabats and two isotherms. E. four adiabats.
While we know of thousands of quasars, it is likely none of them still exist today. Explain
What will be an ideal response?
The speedometer of a car indicates a constant speed of 30 miles per hour. From this we can say that the acceleration of the car is
1) zero. 2) nonzero. 3) can't really say. This is because 4) no net force is acting on the car. 5) any reading (other than zero) on the speedometer indicates acceleration. 6) the car may be changing its direction.