Physic-Energy Flashcards
To know key terms on what energy is and it's types, the laws behind how energy behaves, and how to calculate it
What is the law of Conservation of energy
“Energy cannot be created, nor destroyed, only transferred”
Define
Power
The rate of energy transfer
Equation
Power
Energy/time
Define
Work
Work done is the energy transferred when a force is applied to an object.
Define
Kinetic Energy
The energy that an object possesses due to its motion.
Formula for
Work
Work done = force × distance
Define
Gravitational potential energy
GPE
The energy stored in an object due to its height above a gravitational body
Define
Elastic potential energy
EPE
The energy stored in an object due to its shape
Define
Thermal Energy
The energy stored in an object based on it’s temperature and heat
What are the three mechanisms, thermal energy transfers
- Conduction
- Convection
- Radiation
At what temp will particles stop virbrating
Absoulute 0(−273.15 °C)
Define
Chemical Energy
The potential energy stored in the bonds between atoms in a molecule.
Define
Nuclear Energy
The energy stored in the nucleus of an atom.
Define
Electrical energy
The energy caused by the movement of electrons.
Note:Stored in electrostatic stores
Define
Watts
The rate of energy transfer in electrical devices
Watts=Joules per second
Formula for
Watt
Watts = Energy / Time
Note:Energy should be in joules and time in seconds
Define
Radiant/Electromagnetic energy
The energy found in electromagnetic waves(including light)
Define
Sound energy
The term to describle energy found in oscillating particles
Formula
Kilowatt-Hours
Kilowatts * Time
What is the formula for calculating kinetic energy?
Kinetic energy (KE) = 0.5 * mass (m) * velocity (v)^2
True or False: Potential energy is the energy possessed by an object due to its position.
True
Fill in the blank: The law of conservation of energy states that energy cannot be ______ or ______, only transformed from one form to another.
created; destroyed
What is the efficiency formula?
Efficiency = (Useful energy output / Total energy input) * 100%
Multiple Choice: Which of the following is a common unit of energy? A) Joule B) Meter C) Newton
A) Joule
What is the difference between renewable and non-renewable energy sources?
Renewable energy sources can be replenished naturally (e.g., solar, wind), while non-renewable sources (e.g., fossil fuels) are finite and will deplete.
True or False: An energy transfer is always 100% efficient.
False
Fill in the blank: The gravitational potential energy can be calculated using the formula PE = ______ * mass (m) * height (h).
gravitational acceleration (g)
What type of energy is associated with the motion of an object?
Kinetic energy
Multiple Choice: Which of the following is NOT a form of energy? A) Thermal B) Chemical C) Momentum
C) Momentum
Define
Useful energy
Energy transferred in a system’s intentional way
Define
Wasted energy
Energy transferred in a system’s unintentional way
Define
Dissapated energy
Energy that has transferred out of a a system into it’s surroundings
Define
Sankey diagram
Diagrams used to meausure useful/wasted energy output
Text symbol:—↓→
