What causes ocean water around the equator to be warmer then the ocean water farther south of the equator

a. gyres in the northern hemisphere flow clockwise.
b. upwellings spew warm water toward the equator.
c. the sun heats earth and it’s oceans unevenly.
d. deep sea vents pump stream into oceans unevenly.

Which composition of water moves to begin a deepwater current?

A14 kg rock starting from rest free falls through a distance of 5.0 m with no air resistance. find the momentum change of the rock caused by its fall and the resulting change in the magnitude of earths velocity. earth mass is 6.0 * 10^24 kg. show your work assuming the rock earth system is closed.

It's a snowy day and you're pulling a friend along a level road on a sled. you've both been taking physics, so she asks what you think the coefficient of friction between the sled and the snow is. you've been walking at a steady 1.5m/s, and the rope pulls up on the sled at a 32 ∘ angle. you estimate that the mass of the sled, with your friend on it, is 65 kg and that you're pulling with a force of 80 n .