Energy Basics
What is the ability to do work or cause change?
Energy
What type of energy is stored in food?
Chemical Energy
T/F.
In a closed system, the total amount of energy changes.
False.
What is the transfer of thermal energy from one object to another called?
Heat.
What is work in terms of energy?
Work is the transfer of energy through motion.
What unit is energy measured in?
Joules (J)
What is thermal energy (heat) associated with?
The motion of atoms.
At an amusement park, what is an example of energy being conserved in everyday life?
A Rollercoaster converting kinetic to potential and vice versa.
What type of energy transfer occurs through direct contact?
Conduction.
What is the formula for work?
Work= Force x Distance
What is the law of conservation of energy?
Energy cannot be created nor destroyed, only transferred or transformed.
What type of energy is produced by moving electric charges?
When energy changes form, is the total energy in the system conserved?
Yes.
How is energy transferred in a microwave?
Through electromagnetic radiation.
How is work related to energy?
Work is done when energy is transferred from one object to another.
What is kinetic energy?
The energy stored in an object has due to its motion.
What type of energy is associated with objects that are stretched or compressed?
Elastic Potential Energy
What is an example of energy transformation in a flashlight?
Batteries is transferred from electrical energy into light energy.
What type of energy transfer happens when warm air rises and cool air sinks?
Convection.
If you push an object with a force of 10 N over a distance of 5 M, how much work is done?
50 Joules
What is potential energy?
The energy stored in an object due to its position or condition.
Electromagnetic Energy is carried by....
In what type of energy system is the conservation of energy easiest to observe?
An isolated system because energy has no entrance or exits.
What is an example of energy transfer in a car engine?
Chemical energy in fuel is transferred to thermal energy, and then to mechanical energy.
What is the difference between work and power?
Work is the amount of energy transferred, while power is the rate at which work is done.