A particle moves at a constant speed in a circular path with a radius of 2.06 cm. If the particle makes four revolutions each second, what is the magnitude of its acceleration?
a. 20 m/s2
b. 18 m/s2
c. 13 m/s2
d. 15 m/s2
e. 24 m/s2
C
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The figure below shows the orbit of a comet about the sun. If the area swept out by the line from the sun to the comet is equal when traveling from A to B and when traveling from D to E, what can we say about the time it takes
A. the time to travel from A to B is greater than the time from D to E.
B. the time to travel from A to B is the same as the time from D to E.
C. the time to travel from A to B is less than the time from D to E.
Galactic collisions are believed to be commonplace
Indicate whether the statement is true or false
As you walk away from a plane mirror on a wall, the height of your image
A) is always the same size. B) is always a real image, no matter how far you are from the mirror. C) gets smaller. D) changes from being a virtual image to a real image as you pass the focal point. E) may or may not get smaller, depending on where the observer is positioned.
Two organ pipes, a pipe of fundamental frequency 440 Hz, closed at one end, and a pipe of fundamental frequency 660 Hz, open at both ends, produce overtones. Which choice below correctly describes overtones present in both pipes?
a. After the first overtone of each pipe, every second overtone of the first pipe matches every second overtone of the second pipe. b. After the first overtone of each pipe, every second overtone of the first pipe matches every third overtone of the second pipe. c. After the first overtone of each pipe, every third overtone of the first pipe matches every second overtone of the second pipe. d. After the first overtone of each pipe, every second overtone of the first pipe matches every fourth overtone of the second pipe. e. After the first overtone of each pipe, every third overtone of the first pipe matches every fourth overtone of the second pipe.