Degeneracy pressure is the source of the pressure that stops the crush of gravity in all the following except
A) a brown dwarf.
B) a white dwarf.
C) a neutron star.
D) a very massive main-sequence star.
E) the central core of the Sun after hydrogen fusion ceases but before helium fusion begins.
D
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An ideal polarizer with its transmission axis rotated 30° to the vertical is placed in a beam of unpolarized light of intensity 10 W/m2. After passing through the polarizer, what is intensity of the beam?
A) 2.5 W/m2 B) 5.0 W/m2 C) 8.7 W/m2 D) 7.5 W/m2 E) 10 W/m2
The specific heat capacity of water is about twice the specific heat capacity of ice. The amount of heat required to raise the temperature of 1 kg of water 10°C is __________ times the amount of heat required to raise the temperature of 1 kg of ice 10°C
Fill in the blank(s) with correct word
Describe how we know that the expansion rate of the Universe is currently accelerating
What will be an ideal response?
The density of a certain metal solid is 6.5 × 10^3 kg/m3, and its Young's modulus is 10.0 × 10^10 N/m2 . What is the speed of sound in this metal?
a. 8.1E+1 m/s b. 1.2E+3 m/s c. 3.9E+3 m/s d. 1.2E+5 m/s e. 8.1E+1 m/s