When a gas is changed to a liquid, the gas
A) releases energy.
B) absorbs energy.
C) both of these
D) neither of these
Answer: A
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Two steel spheres are made of the same material and have the same diameter, but one is solid and the other is hollow. If their temperature is increased by the same amount
A) the two spheres remain of equal size. B) the solid sphere becomes lighter and the hollow one becomes heavier. C) the solid sphere becomes bigger than the hollow one. D) the solid sphere becomes heavier and the hollow one becomes lighter. E) the hollow sphere becomes bigger than the solid one.
Process of Science: We cannot test the nebular theory for the formation of the Solar System in a rigorous scientific way because the Sun and planets formed in the distant past
Indicate whether the statement is true or false
A star like the sun has a luminosity of 
How much mass must be turned into energy each second to produce this power?
A. 
B. 
C. 
D. 
E. 
Intrusive definition
What will be an ideal response?