Heat transfer between two substances is affected by specific heat and the chemical composition of the substances. state of matter of the substances at room temperature. thermal equilibrium of the substances. amount of time and area of physical contact between the substances.

D. Amount of time and area of physical contact between the substances

Explanation:

This is because with a greater surface area and more physical contact heat transfer can be transferred more quickly

answer: the rate of diffusion increases with increase in temperature.

increase in temperature, increases the molecular/particles speed (kinetic energy. diffusion means movement of particles through the material.

generally, the heavier the particle the more it interacts with the environment and more the temperature matters. so higher temperature results in higher diffusion.

aquifers are bounded above and below by impermeable rock. the driving force of groundwater movement in confined aquifers is pressure, rather than gravity.