Which statement best compares the moon and Earth?
O They both spin at the same speed.
O The moon has grbon dioxide, but Earth has oxygen and nitrogen.
They both take the same time to complete one revolution around the sun.
O The moon has no atmosphere, but Earth has an atmosphere rich in liquid water

Acalorimeter is to be calibrated: 51.203 g of water at 55.2 degree c is added to a calorimeter containing 49.783 g of water at 23.5c. after stirring and waiting for the system to equilibrate, the final temperature reached is 37.6 degree c. specific heat capacity of water (s = 4.18 j/g∙degree c). calculate the calorimeter constant. (smδt)warm water = -[(smδt)cold water + (calorimeterδtcold water)]