To determine the height of a bridge above the water, a person drops a stone and measures the time it takes for it to hit the water. If the time is 2.3 s, what is the height of the bridge? Neglect air resistance
A) 32 m B) 52 m C) 10 m D) 14 m E) 26 m
E
You might also like to view...
Which nuclear fusion processes occur in Sun-like stars?
a. triple alpha b. CNO and triple alpha c. proton-proton and triple alpha d. All of the other choices are correct.
How do the light-collecting area and best possible angular resolution of telescope with a 10-meter diameter mirror compare to that of a telescope with a 5-meter diameter mirror?
A) The 10-meter telescope has double the light collecting area, and its angular resolution is better by a factor of 2. B) The 10-meter telescope has 4 times the light collecting area, and its angular resolution is better by a factor of 2. C) The 10-meter telescope has 4 times the light collecting area, and its angular resolution is better by a factor of 4. D) The 10-meter telescope has 10 times the light collecting area, and its angular resolution is better by a factor of 5.
After their rocket engines shut off, astronauts experience weightlessness in the orbiting Space Shuttle,
A. and they are accelerating because they are actually in free-fall. B. and they are accelerating because they have constant velocity as they pass overhead. C. but they cannot accelerate because their rocket engines are shut off. D. but they are not accelerating, since nothing actually has weight in space.
The rate of heat dissipation in an AC circuit with resistance, R, and effective current, Irms, is given by which of the following?
a. (Irms)2R c. 2.0 × (Irms)2R b. 4.0 × (Irms)2R d. 0.5 × (Irms)2R