Solve it!
What is the potential energy of an object that has a mass of 40 kg and is at a height of 2.2 m?
862.4 J
Define Chemical Energy.
Energy that is stored in chemical bonds.
Plugging in your Christmas tree
Electrical --> Light
Heat flows from.....
Hot to Cold!!
High to Low!!
What is energy?
Ability to do work (cause change)
What is the potential energy of an object that has a mass of 280 kg and is at a height of 6 m?
16,464 J
Define Electrical Energy.
Energy resulting from the flow of electrons.
Photosynthesis transforms energy from the sun into _____ energy for plants.
Chemical Energy (Food!!)
What is thermal energy?
Energy due to the movement of particles
What is the difference between kinetic and potential energy?
KE= Energy in motion
PE= Energy that is stored (at rest)
A 130 kg object is moving at a speed of 3 m/s. What is its kinetic energy?
585 J
Define Nuclear Energy.
Energy stored in an atoms nuclei.
Using a gas powered leaf blower
Chemical --> Mechanical --> Sound
What do we use to measure heat? Temperature?
Heat= calorimeter
Temperature= thermometer
A resource that can be replaced in a relatively short amount of time.
A 1,800 kg object is moving at a speed of 8 m/s. What is its kinetic energy?
57,600 J
Define Electromagnetic Energy.
Energy that travels through space in the form of waves.
A nuclear power plant
Nuclear --> Thermal --> Mechanical --> Electrical
Name the three ways of heat movement and explain each.
Conduction- transfer of energy due to direct contact
of solid objects
Convection- transfer of energy through currents in fluids (liquid or gas)
Radiation- transfer of energy through invisible waves
What is a good thermal insulator? And provide an example.
Object that does not conduct heat well.
Examples: rubber, glass, plastic, wood, styrofoam
What is the mass of a squirrel if it has 40 J of potential energy and is sitting on a house 2.5 m tall? (YOU WILL HAVE TO MANIPULATE THE FORMULA)
1.63 kg
Define Gravitational Potential Energy.
Energy stored in object's above Earth's surface. It is dependent on the object's height!
A crackling fireplace
Chemical --> Thermal --> Light --> Sound
What is the difference between HEAT and TEMPERATURE?
Heat is the transfer or energy.
Temperature is the measurement of energy.
What is the Law of Conservation of Energy? What type of system is it?
Energy CANNOT be CREATED or DESTROYED! You have the same amount of energy in the beginning AND in the end. It is a CLOSED system!