1cal = 4.186 j, is called a. mechanical equivalent of heat
b. equivalence between mechanical energy and internal energy
c. both a and b.

a) Mechanical equivalence of heat

Explanation:

heat is an energy that is transferred from one body to another because of a difference in temperature and in any system of physical units, the number of units of work or energy equal to one unit of heat.

speed

ratio of distance traveled to time interval

net force

vector sum of forces on object

object

source of diverging light rays either luminous or illuminated

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explanation:

the earths atmosphere is made up of nitrogen and oxygen. solids can turn into gasses through a process called sublimation. sublimation is the transition of a substance directly from the solid to the gas phase, without passing through the intermediate liquid phase.

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