When bullets are fired in a forward direction from a fighter aircraft, the momentum of the aircraft
A) decreases.
B) is unchanged.
C) increases.
Answer: A
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The speed of electromagnetic waves in air is 3.0 × 108 m/s. What is the wavelength of FM radio waves having a frequency of 3.0 × 108 Hz?
A. 3.0 m B. 0.333 m C. 10 m D. 1.0 m E. 6.0 m
An AC series circuit has 18.9-? resistance, 21.1-? inductive reactance, and 15.5-? capacitive reactance. If an effective (rms) emf of 94 V is applied, what is the power output?
a. 2.34E+2 W b. 1.60E+2 W c. 4.66E+2 W d. 4.30E+2 W e. 2.32E+2 W
If the speed of light is represented by c, what equation would you use to determine the distance light travels, x, in a time t?
A. x=c*t B. x=c/t C. x=c+t D. 1/x = c*t
There is a magnetic force on a particle. It is possible that the particle is:
a. uncharged. b. stationary. c. moving in the direction of the magnetic field. d. not part of a wire.