Rubbing two surfaces together creates friction, which expresses itself as heat. It is possible that static electricity will also be created (probable, actually), but there may or may not be a visible result of the buildup and/or neutralization of the charge (and usually there isn't). The force of friction derives from the electromagnetic forces of atoms and their electrons, so it is atomic and molecular forces that give rise to the phenomenon of friction. There are a lot of variables involved when two surfaces come into contact and move past one another. A link to the Wikipedia post on friction is provided. Heat is studied under the heading thermodynamics, and you'll need to fasten your seatbelt when you get ready to surf over there. An additional link is provided.
The significance of studies contain a great many different things. This significance includes being more educated and being able to change things.
A liquid that can dissolve things is a solvent. The thing being dissolved is a solute.
backdrafting <><><> Incomplete brning of the gas, resulting in carbon monoxide being produced.
there is no answer no pencils can be made in a sec Machine made pencils can be produced at more than one per second. Look up a pencil manufacturer. Across the world probably hundreds of pencils a second are being produced.
Air travels through the whistle rubbing against the sides of the whistle than being forced out of the smaller opening at the front. The friction of air against the sides of the whistle is what makes the noise.
Mechanical energy is produced when hands are rubbed together due to the motion and friction between the surfaces rubbing against each other. This mechanical energy can generate heat as a result of the friction, warming up the hands.
When rubbing your hands together, mechanical energy is converted into thermal energy due to the friction between your hands. This process generates heat as a result of the kinetic energy being transferred to the molecules in your hands.
Water and Sun.
The warmth from the sun is a prime example of heat energy, as it radiates heat to Earth. Heat energy is produced when a stove burner is turned on and heats up a pot or pan. The warmth generated by rubbing your hands together is another example of heat energy being produced through friction.
All things that are discontinued are no longer being produced.
Rubbing two objects together can create heat due to friction, which is the resistance that occurs when two surfaces come into contact and move against each other. The friction generates heat energy from the mechanical work being done during the rubbing process.
Mechanical energy is being converted to thermal energy as the scout rubs the sticks together, creating friction that generates heat to ignite the fire.
They are being produced.
proteins stop being produced due to lack of DNA function
Rubbing your flat hands together in sign language usually means "money" or "expensive." It is commonly used to indicate the concept of wealth or the idea of something being costly.
Caring, kissing, holding hands, telling random things, going out together, and enjoy to be together.
Because they will contract as they cool and that will pull the things being connected closer together.