What is the luminosity of a star? A.
the measure of absolute magnitude
B.
the measure of its distance from the Earth
C.
the measure of radius of a star
D.
the measure of total energy output
E.
the measure of its surface temperature

Particle model to predict what will happen if a sharp object creates a hole in the soccer ball

A5 mole sample of liquid acetone is converted to a gas at 75.0°c. if 628 j are required to raise the temperature of the liquid to the boiling point, 15.600 kj are required to evaporate the liquid, and 712 j are required to raise the final temperature to 75.0°c, what is the total energy required for the conversion?

Which of the following notations would be the appropriate and final way to display the formula for magnesium chloride a. mgcl2 b. mg+2cl–1 c. mgcl2 d. mgcl