We can't see the dark side of the moon from earth because -- a. earth casts a shadow on the moon. b. that side of the moon is only visible during the day. c. the speed of the moon's rotation and revolution around earth are the same. d. there is too much debris in the moon's atmosphere.

Prompta snowboarder stands at the top of a hill and decides to see if he can increase his speed on his next trip down the slope.describe one thing the snowboarder could do to incrlase his speed on the slope. explain why this would cause his speed toincrease relate one of newton's laws to this problem.

Select the word from the list that best fits the definition classification of most stars on the h-r diagram

An ice-making machine inside a refrigerator operates in a carnot cycle. it takes heat from liquid water at 0.0 degrees celsius and rejects heat to a room at a temperature of 19.2 degrees celsius. suppose that liquid water with a mass of 76.3kg at 0.0 degrees celsius is converted to ice at the same temperature. take the heat of fusion for water to be l_f = 3.34*10^5 j/kg.how much energy e must be supplied to the device? express your answer in joules.