Doubling only the amplitude of a vibrating mass-on-a-spring system produces what effect on the system frequency?
A) increases the frequency by a factor of 5
B) increases the frequency by a factor of 4
C) increases the frequency by a factor of 3
D) increases the frequency by a factor of 2
E) produces no change
E
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For which of the following will the phenomenon of wave interference apply? (Choose the best answer.)
1.square-shaped pulses 2.sinusoidal pulses 3.triangular pulses 4.all of these
Earth and the Moon are attracted to each other by gravitational force. The more-massive Earth attracts the less-massive Moon with a force
1) less than the force that Moon exerts on Earth. 2) greater than that of the force that Moon exerts on Earth. 3) the same as that of the force that Moon exerts on Earth. This is in accord with 4) the law of inertia. 5) Kepler's Laws. 6) the conservation of energy. 7) the fact that both Moon and Earth orbit about a common point, the center of mass. 8) the law of action and reaction.
The headwater flow of a mountain stream is generally characterized as
A) laminar. B) turbulent. C) meandering. D) all of these
How do the wind speeds of the Martian atmosphere compare with those of Earth?
A) about the same as Earth's B) about one tenth of Earth's C) about 50% of Earth's D) about ten times more than Earth's