physics - energy stores and transfers Flashcards
(26 cards)
What is the definition of energy?
Energy is the ability to do work or cause change.
Name the main types of energy stores.
Kinetic, gravitational potential, elastic potential, thermal, chemical, nuclear, and electrostatic.
True or False: Energy can be created or destroyed.
False: Energy cannot be created or destroyed, only transferred or transformed.
What type of energy is associated with motion?
Kinetic energy.
Fill in the blank: The energy stored in an object due to its position is called __________ potential energy.
gravitational
What is the formula for calculating kinetic energy?
KE = 1/2 mv², where m is mass and v is velocity.
What type of energy is stored in food?
Chemical energy.
Multiple Choice: Which of the following is NOT a type of energy transfer? A) Conduction B) Radiation C) Compression D) Convection
C) Compression
What is thermal energy?
Thermal energy is the energy that comes from the temperature of matter.
True or False: Energy transfer can occur through waves.
True.
Which energy store is involved when a spring is compressed?
Elastic potential energy.
Fill in the blank: The energy transferred from one object to another due to a temperature difference is called __________.
heat
What happens to energy in a closed system?
The total energy remains constant; it is conserved.
What is the unit of energy?
Joule (J).
Multiple Choice: Which energy store is associated with nuclear reactions? A) Chemical B) Nuclear C) Thermal D) Kinetic
B) Nuclear
What is gravitational potential energy dependent on?
Mass, gravitational field strength, and height.
True or False: The energy of an object increases as its height increases.
True.
What is the principle of conservation of energy?
Energy cannot be created or destroyed, only transformed from one form to another.
Fill in the blank: The energy stored in a battery is an example of __________ energy.
chemical
How does energy transfer occur during conduction?
Through direct contact between particles.
What type of energy is released during a chemical reaction?
Chemical energy.
Multiple Choice: Which of the following is a way energy can be transferred? A) Light B) Sound C) Heat D) All of the above
D) All of the above
What is an example of elastic potential energy?
A stretched rubber band.
Fill in the blank: Energy is often transformed from __________ energy to __________ energy in a hydroelectric power station.
potential, kinetic
