A uniform solid sphere rolls down an incline of height 3 m after starting from rest. In order to calculate its speed at the bottom of the incline, one needs to know:
a. the mass of the sphere. b. the radius of the sphere.
c. the mass and the radius of the sphere. d. no more than is given in the problem.
d
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Our Milky Way Galaxy is now known to be quite similar to the nearby Andromeda Galaxy, M-31
Indicate whether the statement is true or false
Which of the following experiments demonstrate the wave properties of light?
A. photoelectric effect B. Compton effect C. diffraction effect D. pair production
A step-up transformer that doubles the input voltage is designed to work with an input voltage that varies at 60 Hz. The frequency with which the output voltage varies is ________ Hz.
Fill in the blank(s) with the appropriate word(s).
An organ pipe open at both ends is 1.5 m long. A second organ pipe that is closed at one end and open at the other is 0.75 m long. The speed of sound in the room is 330 m/s. Which of the following sets of frequencies consists of frequencies which can be produced by both pipes?
a. 110 Hz, 220 Hz, 330 Hz b. 220 Hz, 440 Hz, 660 Hz c. 110 Hz, 330 Hz, 550 Hz d. 330 Hz, 440 Hz, 550 Hz e. 220 Hz, 660 Hz, 1 100 Hz