perpendicular to the jet’s path from left to right, which part of the airplane becomes negatively charged?
A. Its nose
B. Its tail
C. Its top
D. Its bottom
E. Its left wing
F. Its right wing
T. (No part becomes charged.)
C. Its top
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Two-Source Interference of Sound: Two in-phase loudspeakers are placed along a wall and are separated by a distance of 4.00 m. They emit sound with a frequency of 514 Hz. A person is standing away from the wall, in front of one of the loudspeakers. What is the closest distance from the wall the person can stand and hear destructive interference? The speed of sound in air is 343 m/s.
A. 0.34 m B. 0.37 m C. 0.73 m D. 1.2 m E. 1.6 m
Two radio antennas are 120 m apart on a north-south line, and they radiate in phase at a frequency of 3.4 MHz
All radio measurements are made far from the antennas. If the east-west reference line passes midway between the two antennas, what is the smallest angle from the antennas, measured north of east, at which constructive interference of two radio waves occurs? (c = 3.00 × 108 m/s) A) 30° B) 47° C) 43° D) 68° E) 22°
The slowing of clocks in strongly curved space time is known as
a. gravitational radiation. b. time dilation. c. gravitational curvature. d. gravitational red shift. e. hyperspace drag.
Edwin Hubble first found the distance to M31 in Andromeda with its ________ variable stars in its spiral arms
Fill in the blank(s) with correct word