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?
A) 579 ? B) 200 ? C) 100 ? D) 552 ? E) 184 ?
Physics & Space Science
Kevlar forms from the monomers shown. Show the structure of the polymer, in the usual “bracket” format
Physics & Space Science
The half life of uranium-232 is 70 years. The time for 3/4 of a sample of uranium-232 to decay is
a. 35 years b. 70 years c. 125 years d. 140 years e. none of the above
Physics & Space Science
The buoyant force that keeps a ship afloat is an example of
a. Archimedes' principle. b. Pascal's principle. c. Bernoulli's principle. d. Torricelli's principle. e. none of these principles.
Physics & Space Science