It is now believed the majority of mass for most galaxies lies in their dark halos
Indicate whether the statement is true or false
TRUE
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According to Wien's law, _____
A) cooler objects emit more energy than hotter objects when the size of the objects are different B) the hotter an object is, the shorter is the wavelength of its maximum intensity C) the cooler an object is, the shorter is the wavelength of its maximum intensity D) hotter objects emit less energy than cooler objects of the same size
When a mineral's surface reflects light in a manner similar to a smooth metal, the mineral is said to have a(n) ______________ luster
Fill in the blank(s) with correct word
Within a standing wave on a string,
1.all points along the string that oscillate do so within a range of different frequencies and amplitudes. 2.all points along the string that oscillate do so at the same frequency but within a range of different amplitudes. 3.all points along the string that oscillate do so within a range of different frequencies but at the same amplitude. 4.all points along the string that oscillate do so at the same frequency and amplitude.
Ninety percent of all normal stars in a Hertzsprung-Russell (H-R) diagram are:
A) in the giant region. B) in the supergiant region. C) on the random sequence. D) on the main sequence.