rubbing your hands together
The substance that reacts chemically with another to produce heat is called a "reactant."
Rubys
An element is said to be chemically reactive when it combines with another element. These two elements will create a new compound.
Outside the body - yes. Inside, no.
Heat, Pressure, and Chemically active fluids.
The three agents of metamorphism are heat, pressure, and chemically active fluids. Heat causes recrystallization of minerals, pressure can deform rocks, and chemically active fluids can alter the mineral composition of rocks.
Ionic bond.
An artificial indicator is one that is chemically made and you cannot create from Natural Resources e.g. cabbage juice
No, solar panels do not create heat they create energy
Urine doesn't create or excrete heat. It dissipates heat and it would be the value of the temperature and the volume of the urine probably expressed in "calories" of heat energy. For humans the urine exits the body at about 99 degrees, but the volume would be a variable.
Heat, pressure, differential solution.
The three agents of metamorphism are heat, pressure, and chemically active fluids. Heat is responsible for increasing temperature, pressure for increasing stress and confining pressure, and chemically active fluids for introducing new minerals through the process of metamorphism.