Waves propagate at 4.0 m/s along a stretched string. The end of the string is vibrated up and down once every 3.0 s. What is the wavelength of the waves that travel along the string?
a. 3.0 m
c. 6.0 m
b. 12 m
d. 2.7 m
B
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The sky is usually the deepest blue
A) just before a rainstorm. B) during a rainstorm. C) just after a rainstorm. D) just before sunset. E) when the air is humid.
Evidence for very recent water erosion on Mars comes from the observations of
A) dark streaks on crater walls B) channels carved on the slopes of volcanoes C) dried up river beds on the highlands D) mud flows surrounding craters
Two objects of the same mass move along the same line in opposite directions
The first mass is moving with speed v. The objects collide, stick together, and move with speed 0.100v in the direction of the velocity of the first mass before the collision. What was the speed of the second mass before the collision? A) 1.20v B) 10.0v C) 0.900v D) 0.800v E) 0.00v
Which quantum characteristic(s) would quantum computers exploit in order to achieve great computational power with only a few individual quantum elements or "qubits"?
A) Magnetic resonance. B) Uncertainty. C) Entanglement. D) Wave packets. E) Both uncertainty and entanglement.