In what way does our theory of nuclear fusion predict that the Sun should be different today than it was when fusion began about 4-1/2 billion years ago?
A) The Sun's mass should be about 30% higher today.
B) The Sun's mass should be about 30% lower today.
C) The Sun's luminosity should be about 30% higher today.
D) The Sun's radius should be about 30% higher today.
E) The Sun's distance from Earth should be about 30% lower today.
C) The Sun's luminosity should be about 30% higher today.
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An underwater scuba diver sees the Sun at an apparent angle of 39.6° from the vertical. How far is the Sun above the horizon? (nwater = 1.333)
a. 58.2° b. 61.4° c. 31.8° d. 28.6° e. 39.6°
When an atom is in a magnetic field, the electron energy levels remain unaltered because the atom is limited to a single wavelength
Indicate whether the statement is true or false
A ventilation fan with a moment of inertia of 0.034 kg·m2 has a net torque of 0.11 N·m applied to it. If it starts from rest, what angular momentum will it have 9.0 s later?
a. 0.88 kg·m2/s b. 0.99 kg·m2/s c. 2.0 kg·m2/s d. 3.3 kg·m2/s
If the temperature and number of molecules remain constant for a gas, a pressure increase results in a volume ______________
Fill in the blank(s) with correct word