Imagine that sound waves with a certain definite wavelength flow through a partially open sliding door. If the door is closed somewhat further (but not shut entirely), the angle through which the sound waves are diffracted
A. Decreases.
B. Increases.
C. Remains the same.
D. Depends on quantities not specified (explain).
B. Increases.
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A rocket is moving at 1/4 the speed of light relative to Earth. At the center of this rocket, a light suddenly flashes. To an observer at rest on Earth,
A) the light will reach the front of the rocket at the same instant that it reaches the back of the rocket. B) the light will reach the front of the rocket before it reaches the back of the rocket. C) the light will reach the front of the rocket after it reaches the back of the rocket.
Which alcohol is used in rubbing alcohol?
a. 2-Hydroxypropane b. Ethylene glycol c. Ethanol d. Methanol
As a moon in a very elliptical orbit moves closer to and then farther from a planet, gravity flexes the moon with tides, and friction heats the interior. This process is referred to as
a. tidal heating. b. occultation. c. vaporization. d. differentiation. e. sublimation.
What do all the stars in the Orion Association have in common?
What will be an ideal response?