The change in entropy of 1.00 kg of water that is heated from 50°C to 100°C is (in cal/K)
a. 516
b. 312
c. 144
d. 946
e. 391
C
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Impedance: A 120-V rms voltage at 1000 Hz is applied to a series RLC circuit with an equal value of inductive and capacitive reactance and a 200-? resistance. What is the impedance of this circuit?
A. 100 ? B. 0 ? C. 240 ? D. 120 ? E. 200 ?
The initial mass of a protostar generally determines the star's future evolution. But in some cases, what can alter this process?
A) The star may be isolated in space, far from other influences. B) The star may gain mass by passing through a dark cloud. C) The star may be in a spectroscopic binary system. D) The star may drift away from the other stars in its formation cluster. E) The star may collide with another, unrelated star.
A carousel that is 5.00 m in radius has a pair of 600-Hz sirens mounted on posts at opposite ends of a diameter
The carousel rotates with an angular velocity of 0.800 rad/s. A stationary listener is located at a distance from the carousel. The speed of sound is 350 m/s. The maximum beat frequency of the sirens at the position of the listener is closest to A) 6 Hz. B) 8 Hz. C) 10 Hz. D) 12 Hz. E) 14 Hz.
Why do spiral galaxy mergers often trigger starbursts?
What will be an ideal response?