Question

what is the relationship between heat (energy) and viscosity? when heat increases, viscosity decreases. viscosity and heat are not related. when heat increases, viscosity increases. when heat decreases, viscosity decreases.

Explanation:

In general, for most fluids, when heat (energy) is added and the temperature increases, the molecules gain more kinetic energy and can move more freely, reducing the internal friction that causes viscosity. So viscosity decreases with an increase in heat.

Answer:

When heat increases, viscosity decreases.