Energy Transformations
Burning a candle is a form of chemical energy. What two other forms of energy does that chemical energy transform into?
Chemical energy -> heat energy + light energy
Potential Energy + Kinetic Energy = ___ Energy
Mechanical
What is saved up or stored energy?
Potential energy.
Energy that has the ability to fall; this type of energy increases the higher up you go.
(Gravitational) potential energy.
Energy is defined as _________.
The ability to do work.
___ energy transforms into ___ energy when using a hot plate to boil water.
Electrical energy -> heat energy
What is the formula for calculating Gravitational Potential Energy?
PEg = mass x gravity x height or PEg = mgh
What is the process of spending energy or energy in motion.
Kinetic energy.
Energy from the making or breaking of bonds. ex burning paper or digesting food.
Chemical energy.
What are the units for Energy?
Joules (J)
A hungry football player eating a large sandwich then going out of the field to play. ___ energy -> ___ energy
Chemical energy -> mechanical energy
What is the formula for calculating Kinetic Energy?
KE = 1/2 mass x velocity2 or 1/2mv2
A heavy vase on a table has this type of energy.
(Gravitational) potential energy.
This type of energy is motion and is made up of two additional types of energy.
Mechanical energy.
Geothermal Energy
Using a battery powered flashlight. ___ energy -> ___ energy
chemical energy ->light energy
Calculate the potential energy of a 2 kg book sitting 2 meters above the ground. Remember Earth's gravity is 9.8 and don't forget your units!
PE = 2 X 9.8 X 2 = 39.2 J
A person running down the sidewalk has this type of energy.
(Mechanical) kinetic energy.
This type of energy is caused by vibration of matter
Sound energy.
A boulder rolls down a hill into a valley and then up another hill. Describe where the boulder would have the greatest kinetic energy
At the bottom of the hill, before it goes up the other hill
Photosynthesis. ___ energy -> ___ energy
solar energy -> chemical energy
Calculate the kinetic energy of a car with a mass of 1500 kg traveling at a velocity of 20 m/s. Don't forget units!
KE = 1/2mv2 = 1/2 x 1500 x 202 = 300,000 J
A person that has just jumped from an airplane has this type of energy. (2 types)
(Gravitational) potential and kinetic energy.
Give me three types of energy that occur in, or is produced by, the sun.
Heat, Solar, Nuclear and Light
State the Law of Conservation of Energy.
Energy can be not be created or destroyed.