After a skydiver reaches terminal velocity,
a. the force of gravity no longer performs work on the skydiver.
b. work performed by the force of gravity is converted into gravitational potential energy.
c. gravitational potential energy is no longer available to the system of the skydiver plus the Earth.
d. gravitational potential energy is converted into thermal energy.
e. thermal energy is converted into gravitational potential energy.
d
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One of the harmonics of a string fixed at both ends has a frequency of 52.2 Hz and the next higher harmonic has a frequency of 60.9 Hz. What is the fundamental frequency of the string?
A) 26.1 Hz B) 8.7 Hz C) 4.35 Hz D) 30.4 Hz E) 17.4 Hz
If ? = 4, how many possible values can the magnetic quantum number m? have?
A) 4 B) 10 C) 5 D) 9 E) 3 F) 8
Galaxies in all directions are observed to be streaming away from us as if we were in the center of the universe
Contrast this impression with the Cosmological Principle and explain why a simple-minded interpretation of the Hubble expansion is incorrect.
In ultrasound the wavelength of the sound is much smaller than in normal sound
Indicate whether the statement is true or false