When we say that the Sun is a ball of plasma, we mean that
A) the Sun is made of material that acts like a liquid acts on Earth.
B) the Sun is made of atoms and molecules.
C) the Sun consists of gas in which many or most of the atoms are ionized (missing electrons).
D) the Sun is roughly the same color as blood.
C
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Define the solid angle.
What will be an ideal response?
The pressure of sunlight was one of the forces that cleared the solar nebula
a. True b. False Indicate whether the statement is true or false
Wave Characteristics: The wavelength of an electromagnetic wave is 600 nm. What is its frequency? (c = 3.0 × 108 m/s)
A. 200 × 1012 Hz B. 300 × 1012 Hz C. 400 × 1012 Hz D. 500 × 1012 Hz E. 600 × 1012 Hz
A 35-N bucket of water is lifted vertically 3.0 m and then returned to its original position. How much work did the gravitational force exerted by Earth on the object do on the bucket during this process?
A) 180 J B) 90 J C) 45 J D) 0 J E) 900 J