Energy transfer by convection is usually restricted to what type of substance?

The correct answer is fluids.

Explanation:

There are 3 modes of heat transfer that happens:

1. Conduction: In this type of heat transfer, heat is transferred when there is direct contact between the two object.

2. Convection: In this type of heat transfer, heat is transferred when there is a movement of fluid (liquid or gas).

3. Radiation: In this type of heat transfer, heat is transferred when there is direct transfer of energy through space.

Hence, convection is only restricted to fluids which are liquids and gases.

jupiter is the largest planet in our solar system, having a mass and radius that are respectively, 318 and 11.2 times that of earth. suppose that an object falls from rest near the surface of each planet and that the acceleration due to gravity remains constant during the fall. each object falls the same distance before striking the ground. determine the ratio of the time of fall on jupiter to that on earth.