The ____________________ of a black hole is the radius from the black hole at which the escape velocity is equal to the speed of light
Fill in the blank(s) with correct word
event horizon
Schwarzschild radius
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Magnetic reversals of the Earth's field have occurred on the average every 200,000 years over the past 5 million years. When was the last magnetic reversal?
a. about 200,000 years ago c. about 990,000 years ago b. 1792 d. about 780,000 years ago
The position of a mass that is oscillating on a spring is given by x = (18.3 cm) cos[(2.35s-1)t]. What is the frequency of this motion?
A) 0.426 Hz B) 1.34 Hz C) 2.67 Hz D) 0.128 Hz E) 0.374 Hz
Compare and contrast longitude and right ascension
What will be an ideal response?
For the circuit shown in the figure, the inductors have no appreciable resistance and the switch has been open for a very long time
(a) The instant after closing the switch, what is the current through the 60.0-? resistor? (b) The instant after closing the switch, what is the potential difference across the 15.0-mH inductor? (c) After the switch has been closed and left closed for a very long time, what is the potential drop across the 60.0-? resistor?