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.

An experiment is designed to test the relationship between the initial height of a basketball before it is dropped to the height of its rebound bounce. the height of the rebound bounce is measured using a scale positioned behind the ball. in the above experiment, which condition would not be controlled? a). the starting height of the ballb). the surface the ball bounces on c). the type of ball d). the method to measure the rebound height of the ball

Atrain departs from its station at a constant acceleration of 5 m/s. what is the speed of the train at the end of 20s?

Oxygen undergoes an isentropic expansion from 120 degree c and 280 kpa absolute to 140 kpa absolute. determine the final temperature of the oxygen and the amount of work per kg of o_2 produced in the process if it is adiabatic.