A ball is thrown vertically upward with an initial speed of 20 m/s. Two seconds later, a stone is thrown vertically (from the same initial height as the ball) with an initial speed of 24 m/s. At what height above the release point will the ball and stone pass each other?
a. 17 m
b. 21 m
c. 18 m
d. 27 m
e. 31 m
a
Physics & Space Science
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A 25.0-mH inductor, a 2.00-?F capacitor, and a certain resistor are connected in series across an ac voltage source at 1.00 kHz. If the impedance of this circuit is 200 ?, what is the value of the resistor?
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The half life of uranium-232 is 70 years. The time for 3/4 of a sample of uranium-232 to decay is
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