The mass of a mass-and-spring system is displaced 10 cm from its equilibrium position and released. A frequency of 4 Hz is observed. What frequency would be observed if the mass had been displaced only 5 cm and then released?
A) 8 Hz
B) 4 Hz
C) 6 Hz
D) 2 Hz
B
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Using graphical techniques estimate the temperature distribution through the earth around the electrical power line shown in Figure 2-62. Then estimate the heat transfer per unit length between the line and the ground surface.
Since LF,ice = 333 J/g, what is the change in entropy (in cal/K) when 1.00 kg of ice melts?
a. 144 b. 291 c. 312 d. 516 e. 80
Where are the X-rays produced that are emitted by quasars and other active galactic nuclei?
A) in the hot gas in an accretion disk around a central black hole B) in dust grains in molecular clouds that encircle the active galactic nucleus C) in an ionization nebulae of interstellar gas surrounding the accretion disk D) in fast-moving jets of electrons that are ejected from the active galactic nucleus E) all of the above
Estimate the acceleration of the Moon relative to the center of the Earth in m/s²
1.less than 0.003 2.between 0.003 and 0.03 3.between 0.03 and 0.3 4.between 0.3 and 3 5.between 3 and 30 6.between 30 and 300 7.between 300 and 3,000 8.between 3,000 and 30,000 9.more than 30,000 10.Impossible to determine