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What machine or thing changes electrical energy into light and sound energy?
...
What form of energy?
Mechanical energy
Give two examples that shows KINETIC ENERGY.
...
Another name for thermal energy
Heat energy
It is the ability to do work by movement of electric charge (electricity).
Electrical energy
Energy that is stored in the bonds between atoms. (Example: food and battery)
Chemical energy
It is the type of energy released when the nucleus of an atom is split apart or combined with another nucleus.
Nuclear energy
It is the type of energy an object has because of its motion.
Kinetic energy
Methods how to reduce friction
Make the surface smooth and rolling friction
Two ways how friction increases
Rougher surfaces and weight increase
What does friction produced? (Form of energy)
Heat
When most objects with smooth surfaces rub, there is less friction.
True
Swimming fishes experience -
Fluid friction
Sally experiences -
Sliding friction
What the of friction occur in this picture?
Rolling Friction
Which type of friction occurs when an object moves through a liquid or gas?
Fluid friction
A type of friction that occurs when air pushes against a moving object causing it to negatively accelerate.
Air resistance
It is a force that acts in an opposite direction of movement.
Friction
Oil between machine parts would be an example of which type of friction?
Fluid friction
The law of universal gravitation is credited to whom?
Newton
The measure of how much matter is in an object.
Mass
What is the force acting between any two objects in the known universe all the time?
Gravitational force
What is the SI unit used to measure weight? (Remember the definition of weight!)
Newton
Two factors effecting the magnitude of the force of gravity between 2 objects are...
Mass and distance