Most astronomical objects emit light over a broad range of wavelengths
Indicate whether the statement is true or false
TRUE
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What is the celestial sphere?
A) The celestial sphere is a representation of how the entire sky looks as seen from Earth. B) The celestial sphere is a model that shows the true locations in space of the Sun and a few thousand of the nearest stars. C) The celestial sphere is a model of how the stars are arranged in the sky relative to our Sun, which is in the middle of the sphere. D) It represents a belief in an Earth-centered universe, and hence is no longer considered to have any use.
Two life preservers have identical volumes, one filled with Styrofoam and the other filled with sand. When each is worn by swimmers, one swimmer floats and the other sinks. Interestingly, the buoyant force is actually greater on the life preserver that
A) sinks. B) floats. C) same either way D) none of the above
One type of event that may generate gravity waves of sufficient strength to be detected with current equipment is the death spiral of a neutron star as it plunges into a black hole
Indicate whether the statement is true or false
A 0.13-m string, fixed at both ends and vibrating in its n = 4 harmonic, excites a pipe that is long and open at both ends, into its second overtone resonance
What is the speed of transverse waves on the string? The speed of sound in air is 345 m/s. A) 30 m/s B) 38 m/s C) 36 m/s D) 32 m/s E) 34 m/s