The Moon's angular diameter at apogee is larger than at perigee
a. True
b. False
Indicate whether the statement is true or false
False
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A 1056-hertz tuning fork is sounded at the same time a piano note is struck. You hear three beats per second. What is the frequency of the piano string?
A) 1056 hertz B) 1059 hertz C) 1053 hertz D) 3168 hertz E) need more information
A student constructs an astronomical telescope and wishes it to have a magnification of 10. If the telescope has an objective lens of focal length 0.50 m, what must be the focal length of the eyepiece?
A) 2.5 cm B) 5.0 cm C) 10 cm D) 25 cm
Copernicus was the first to propose that Earth moved around the sun
Indicate whether the statement is true or false
A 0.50-kg mass attached to the end of a string swings in a vertical circle (radius = 2.0 m). When the string is horizontal, the speed of the mass is 8.0 m/s. What is the magnitude of the force of the string on the mass at this position?
a. 16 N b. 17 N c. 21 N d. 11 N e. 25 N