Which of the following do all living things need to survive?
a. water
b. oxygen
c. sunlight
d. carbon dioxide

If water is at -10 ° c and energy is added to the water until it is 50 ° c while maintaining a constant pressure of 760 mmhg, describe the phase change of the water?

A60-tooth gear is connected to a 72-tooth gear. if the smaller gear turns 12 times, how many turns does the larger gear make?

The law of thermodynamics states that energy can't be created or destroyed. to natural sources of energy on earth are the