Center of Mass: There must be equal amounts of mass on both sides of the center of mass (or center of gravity) of a system.
A. True
B. False
Answer: B
Physics & Space Science
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LR Circuits: A series circuit contains a 1.0-k ? resistor, a 5.0-mH inductor, and an ideal 25-V power supply. What is the time constant for the circuit?
A. 5.0 ?s B. 5.0 s C. 1.6 ?s D. 1.6 s
Physics & Space Science
Suppose you hear a car approaching and its horn is heard as a 3037. Hz tone. After passing, you hear 2430. Hz
(a) What was the Mach number of the car? (b) What is the speed of sound if the outside temperature is 19.°C? (c) How fast was the car moving, in meters per second?
Physics & Space Science
In terms of e, what is the charge of a particle whose quark composition is uds?
A. 0 B. 1 C. -1 D. 2 E. -2
Physics & Space Science
Stars in globular clusters belong to Population ________.
A. I B. II C. III D. Zero
Physics & Space Science