One watt is equal to ______________ per second
a. one kilogram
b. one newton
c. one joule
d. one meter
c
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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
The special theory of relativity predicts that there is an upper limit to the speed of an object. It therefore follows that there is also an upper limit on which of the following properties of the object?
(There could be more than one correct choice.) A) The kinetic energy of the object. B) The total energy of the object. C) The linear momentum of the object. D) None of the above.
____ of the Milky Way contains mostly old (population II) stars and globular clusters
a. The disk component b. The spherical halo component c. The hydrogen gas in the disk d. The spiral arms e. Sgr A
If the density of the universe is at the critical density, then the geometry of the universe would follow ordinary Euclidean geometry
Indicate whether the statement is true or false