6 How do your muscles convert chemical energy into kinetic energy?
Describe the conversions between potential and kinetic energy that occur when you jump on a trampoline?
The energy for muscle contractions ultimately comes from chemical reactions in the body that convert stored chemical potential energy into kinetic energy of the muscles, and subsequently of the jump. However, not all of that chemical energy is successfully converted into kinetic energy. Some is dissipated as heat, and a significant amount is lost into the ground.
The chemical energy - sugars - in your bloodstream are absorbed by the muscle cells in your arms. Your muscles convert this chemical energy into kinetic energy (the energy of motion) in moving the match against the sandpaper surface. The movement of the match against the sandpaper surface causes friction, changing the kinetic energy into heat. The heat of friction in the matchhead causes the phosphorus coating to ignite, converting the heat of friction into…
What energy transformation is it when a driver fills his car with gas then drives three hundred miles?
The major conversions are chemical energy in the fuel to heat energy in the cylinders to kinetic energy of the car. Other changes involved include chemical energy in the driver's food to kinetic energy in his muscles to operate the pump, and electrical energy in the pump to kinetic energy of the fuel as it flows into the car.
-- Wind (moving air) (kinetic energy) ===> turns windmill ===> electrical energy -- Gasoline (chemical energy) ===> makes car move (kinetic energy) -- Battery charger (electrical energy) ===> charges battery (chemical energy) -- Propane (chemical energy) ===> fuels barbecue (thermal energy) -- Ribs from barbecue (food energy) ==> powers muscles ==> to run around the block (kinetic energy) -- Battery (chemical energy) ==> used in flashlight (electrical energy) ==> lights bulb (light and heat energy)
There are many ways to convert one form of energy into another form. We do have to start with energy (or in the case of an atomic bomb, mass-energy) in order to make another form of energy because it is impossible to make energy out of nothing (as stated in the law of conservation of mass-energy). Since the human body runs on chemical energy, we do use some degree of chemical energy in everything we…
All sorts of changes in the form of energy happen when you drive a car. The engine converts the chemical energy of the gasoline into heat energy. The pistons convert that energy into kinetic energy. Friction turns that energy back into heat, which is lost into the atmosphere. When you go up or down a hill, you also convert some kinetic energy into potential energy, or vise versa.
Chemical energy from the food the rider has eaten gets turned into mechanical / kinetic energy as the bike picks up speed, potential energy if the rider heads uphill, and heat in the muscles, bearings and tires. The bicycle by itself doesn't do any energy transformation. It just sits there, maybe rusting, rotting slowly. A bicycle by itself only represents the energy tied up in its material, and maybe some potential energy depending on where…
Here are a few examples: Engines (gasoline, diesel, gas turbine) - Convert chemical energy to mechanical energy. Electric motors - Convert electrical energy to mechanical energy. Wind turbines - Convert the kinetic energy of wind into mechanical energy (which is then commonly turned into electrical energy by a generator hooked to the turbine). A light bulb - Turns electrical energy into light and heat. A wood stove - turns chemical energy into heat (and a…