A 1024 Hz tuning fork is dangled at the end of a string such that its center of mass is 1.2 m below the point at which the other end of the string is attached to door frame, making a pendulum of sorts. The tuning fork may be treated as a point mass for the purposes of this problem. If the pendulum is brought to a maximum angle and released. If the range of frequencies heard by an observer standing in the plane of the pendulum's motion is 1020-1028 Hz, what is the angle to which the pendulum was raised? The speed of sound in this case is 340 m/s.
a. 
b. 
c. 
d. 
e. 
a.
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Venus is brightest as seen from Earth:
A) at greatest eastern elongation, appearing half lit in the evening sky. B) at greatest western elongation, appearing half lit in the morning sky. C) 36 days before or after inferior conjunction, appearing as a large crescent. D) at inferior conjunction, when closest to Earth and largest in apparent size. E) at superior conjunction, and fully lit.
One star appears blue-white while another appears yellow-orange. If this is caused by temperature difference, then
A) the stars are the same brightness. B) the yellow-orange star is hotter. C) the blue-white star is brighter. D) the blue-white star is hotter. E) the yellow-orange star is brighter.
A quantity of ideal gas undergoes a thermodynamic process. Which curve represents an isobaric path?
When evaporation rate equals the condensation rate, the air is
A) humid. B) super-saturated. C) at its water-vapor capacity. D) cool, with decreasing relative humidity.