Energy Test Review

A television set changes electrical energy to sound and light energy A television set changes electrical energy to sound and light energy. In this process some energy is created destroyed changed to matter changed to heat

Kinetic energy increases as mass increases and velocity decreases mass decreases and velocity stays the same both mass and velocity increase both mass and velocity decrease

Use the transformation sequence below to answer the question chemical energy  thermal energy mechanical energy The sequence of energy changes shown in the diagram explains which event? a candle burns a flashlight is on gasoline burns to move the pistons in a car engine electric current runs a refridgerator

An electric fan converts kinetic energy to mechanical energy, heat, and sound kinetic energy to electrical energy, heat, and sound electrical energy to mechanical energy, heat, and sound electrical energy to chemical energy, heat, and sound

Work can be considered the transfer or ______ to an object. energy force motion friction

The Law of Conservation of energy states that when one form of energy is converted to another energy is destroyed in the process energy is created in the process energy is not created or destroyed in the process some energy is converted to matter in the process

Heat transfer occurs in many directions only from warm objects to colder ones only from cold objects to warmer ones randomly

Think about a lava lamp, which is a good example of the three main ways thermal energy is transferred. Define each method of transfer, identify where it occurs, and explain how each method demonstrates the transfer of thermal energy. Definition Where it Occurs Explanation Conduction The transfer of heat between substances that are in direct contact with each other Bulb  glass Liquid  glass Glass  air Substances are in direct contact when heat is transferred Convection Transfer of thermal energy due to the flow of particles Rise and fall of oil in lava lamp Convection current created when warm oil rises to top of lamp Radiation Transfer of TE that does not require matter Light from bulb Heat from lamproom Could occur without air (light energy)

What is the gravitational potential energy of 95kg diver on a diving board that is 22 meters above the pool? Formula: GPE = m x 9.8 x h Answer: 20,482 J

What is the kinetic energy of Steven riding his bike (combined mass of Steven and his bike 115 kg) at a velocity of 3.5 m/s? Formula: KE = 1 2 𝑚𝑣 2 Answer 704.38J