chapter 13 Flashcards
learn energy (42 cards)
what is energy?
the ability to do work
what is power
the rate at which energy is used (speed) measured in watts
what are the two types of energy
kinetic and potential energy
what is kinetic energy
the energy of motion, depends on how fast something is moving
formula = KE = 1/2 * mass * velocity².
More velocity = more kinetic energy.
Potential Energy (PE):
- Stored energy. It’s energy that can be used later.
- Depends on height and position.
-Formula: GPE = mass * gravity * height.
what is GPE
Gravitational Potential Energy (GPE) is a type of potential energy that depends on height (how far above the ground).
what is an energy transformation
when one form of energy goes to another form
Example: A roller coaster goes up (potential energy), then comes down (kinetic energy).
CEMENT
C: Chemical Energy (energy stored in bonds between atoms, like in food or fuel).
E: Electromagnetic Energy (energy from light, radio waves, etc.).
M: Mechanical Energy (energy of movement and sound).
E: Electrical Energy (energy from moving electrons).
N: Nuclear Energy (energy stored in the nucleus of atoms).
T: Thermal Energy (energy from the motion of molecules, heat).
real life examples of cement
Chemical Energy: Food, batteries, fuel.
Mechanical Energy: A moving car, a swinging pendulum.
Thermal Energy: Hot stove, fire.
Electromagnetic Energy: Light from a lamp, radio signals.
Electrical Energy: Lightning, powering a phone.
Nuclear Energy: Energy in the Sun, nuclear power plants.