Heat transfer takes place when: A. there is a temperature difference.
B. conduction or convection occurs, but not radiation.
OC. thermal energy is present.
D. None of these

Give more examples of this type of heat transfer:

When did stem cell research become known ? who discovered stem cell? what experiments or studies have been conducted so far?

Which activity describes an application of topographic maps? check all that apply. recreation, such as camping and hiking engineering, such as the construction of roads and buildings science, such as mapping stars in the sky business, such as analyzing population centers science, such as analyzing surface features