Earth is about 150 million km from the Sun, and the apparent brightness of the Sun in our sky is about 1,300 watts per square meter
Determine the apparent brightness we would measure for the Sun if we were located one-third of Earth's distance from the Sun.
The Sun would appear nine times brighter. So the apparent brightness would be 9 × 1,300 watts per square meter = 11,700 watts per square meter.
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The two types of mechanical energy are ______________ and ______________
Fill in the blank(s) with correct word
Which of the following are SI units of Young's modulus? (There could be more than one correct choice.)
A) N/m ? s2 B) kg/m2 C) kg ? m/s2 D) kg/m ? s2 E) kg ? m2/s2
Thermal Expansion: A solid object has a volume density ?0 at a temperature of 315 K. The coefficient of volume expansion for the material of which it is made is 7.00 × 10-5 K-1. What will be its density (in terms of ?0 at a temperature of 425 K, assuming that it does not melt and that its thermal properties do not change with temperature?
Fill in the blank(s) with the appropriate word(s).
Almost all molecules in space are based on what element? Why?
What will be an ideal response?