Two motors in a factory are running at slightly different rates. One runs at 825 rpm and the other at 786 rpm. You hear the sound intensity increase and then decrease periodically due to wave interference
How much time elapses between successive maxima of the sound intensity? A) 1.5 s
B) 1.4 s
C) 1.7 s
D) 1.8 s
A
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Which of the following is the largest object in the asteroid belt?
A) Ceres B) Io C) Titan D) Europa
A planet's density can be measured by combining
A) Doppler and astrometric observations. B) Doppler and transit observations. C) spectral observations of the planet's atmosphere. D) any method that measures the gravitational tug of the planet on the star. E) direct imaging from the new generation of space telescopes.
According to the nebular theory, where should jovian planets form?
A) in the cold outer regions of the disk, where rocks, metals, and ices can condense B) within the inner few AU of the disk, where only rocks and metals can condense C) at the inner edge of the planet forming disk, where even metal and rock evaporate
The vertical displacement y(x,t) of a horizontal string aligned along the x-axis is given by the equation
y(x,t) = (6.00 mm) cos[(3.25 m-1)x - (7.22 s-1)t]. What are the (a) wavelength and (b) period of this wave?