A series of ocean waves, each 6.0 m from crest to crest and moving past an observer at a rate of 2.0 waves per second, has what speed?
12 m/s
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If you are standing on the street listening to the siren of an ambulance as it is moving away from you, which of the following is TRUE?
A) the pitch/frequency of the siren seems lower than it really is B) the siren sounds louder than it really is C) none of the above D) the pitch/frequency of the sound is identical to what it would have been if the ambulance were not moving E) the pitch/frequency of the siren seems higher than it really is
Surrounding a magnet is a magnetic field. Surrounding an electron is an electric field. Surrounding Earth is
A) an alteration in space in which mass experiences a force. B) a gravitational field. C) both of these D) neither of these
In the context of understanding stellar lives, "high-mass" stars have masses
A) more than about 8 times the mass of our Sun. B) more than about 3 times the mass of our Sun. C) more than twice the mass of our Sun. D) more than 20 times the mass of our Sun.
Out immediately beyond the orbit of the planet Neptune we find
A) Orion's belt B) the asteroid belt C) the Kuiper belt D) the Oort cloud