A wave's velocity is the product of the:
A) frequency times the period of the wave.
B) period times the energy of the wave.
C) amplitude times the frequency of the wave.
D) frequency times the wavelength of the wave.
E) amplitude times the wavelength of the wave.
D
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What do we mean by the "fossil record"?
A) rocks from earlier periods of the Earth's history B) samples of meteorites that fell to Earth early in its history C) remains of ancient organisms preserved in rocks D) an album by the Rolling Stones
Which of the following observations does NOT inform astronomers about how the Solar System must have formed.
A. The Solar System is flat in structure. B. All known ages for Solar System bodies are 4.6 billion years or younger. C. The farther out planets take longer to complete an orbit about the Sun. D. The inner four planets are small and rocky, while the outer four planets are large and gaseous.
A dinner plate falls vertically to the floor and breaks up into three pieces, which slide horizontally along the floor. Immediately after the impact,
a 200-g piece moves along the +x-axis with a speed of 2.00 m/s, a 235-g piece moves along the +y-axis with a speed of 1.50 m/s. The third piece has a mass of 100 g. What is the speed of the third piece? A) 2.51 m/s B) 2.57 m/s C) 3.50 m/s D) 5.33 m/s E) 6.83 m/s
Buoyancy: A 200-kg flat-bottomed boat floats in fresh water, which has a density of 1000 kg/m3. If the base of the boat is 1.42 m wide and 4.53 m long, to what depth is the bottom of the boat submerged when it carries three passengers whose total mass is 257 kg?
A. 7.10 cm B. 7.53 cm C. 7.95 cm D. 8.52 cm