Types of Energy
The type of energy is inside a hamburger
Chemical
What is wasted energy?
energy that is no use
what energy is transferred from hot objects to cool objects
heat
what is the input and useful output energy in a radio?
Electric -> sound
What is the type of energy wasted in a lightbulb?
heat
The type of energy that a person running very fast would have
Kinetic
What is energy measured in?
Joules
what energy is produced by vibrating objects
sound
what is the input and useful output energy in a buzzer
electrical -> sound
An electric kettle turns electric energy into heat and sound energy. Which is the waste energy?
sound
What type of energy does a squashed spring have?
elastic potential
What is the equation used to calculate efficiency?
Useful energy output/ Total energy input
what is the definition of gravitational potential energy
energy stored in objects found above ground/high up
what is the input and useful output energy in asolar panel?
light -> electrical
Calculate the efficiency of a kettle that takes in 100J of electrical energy and produces 35J of useful heat energy.
0.35 (35%)
what kind of energy does a person standing at the top of a diving board have?
gravitational potential
What is the principles of the conservation of energy?
Hint: It starts with Energy cannot be....
Energy cannot be created or destroyed, only changed from one form into another
explain what nuclear energy is
energy contained inside atoms
what is the input and useful output energy in a match?
chemical -> heat + light
Calculate the efficiency of a lightbulb that takes in 50J of energy and produces 4J of useful energy.
0.08 or (8%)
The energy transfer that nuclear power plants have
Nuclear --> Electrical
When a ball is dropped from a height why does it not bounce as high as the original height ?
some energy is lost to heat/sound
or not all energy converted to kinetic
explain what chemical energy is
energy stored inside food, fuels and batteries
what is the input and useful output energy in a microphone
sound -> electrical
Calculate the efficiency of a lightbulb that takes in 500J of electrical energy and produces 200 J of light energy and 300 Watts of heat energy
0.4 or 40% flow