Question

energy changes
you have seen a number of examples of energy changes. lets see if you can identify some energy changes on your own.
fill in exercise
there are 10 examples of energy changes below. type in or print and fill in what you think the energy in and energy out will be for each example. then check your answers against the answers given below.
example
description\tenergy in\tenergy out
1\tblender\telectrical\tmechanical
2\tsolar panel powered communications satellite\tsolar\telectrical, radio waves
3\tgas powered grill\tchemical\tthermal
4\twater dispenser\telectrical\tthermal
5\telectric pencil sharpener\telectrical\tmechanical

Explanation:

Step1: Identify energy - in for blender

A blender is powered by electricity, so the energy - in is electrical energy.

Step2: Identify energy - out for blender

The blender uses this electrical energy to rotate its blades, so the energy - out is mechanical energy.

Step3: Identify energy - in for solar - powered satellite

The solar panel on the satellite absorbs solar (light) energy, so the energy - in is solar energy.

Step4: Identify energy - out for solar - powered satellite

The satellite uses this energy to transmit signals, which is in the form of electromagnetic (radio - wave) energy and also has some electrical energy for its internal operations. So the energy - out is electrical and radio - wave energy.

Step5: Identify energy - in for gas - powered grill

The gas in the grill contains chemical energy, so the energy - in is chemical energy.

Step6: Identify energy - out for gas - powered grill

The gas burns to produce heat, so the energy - out is thermal energy.

Step7: Identify energy - in for water dispenser

A water dispenser is plugged into an electrical outlet, so the energy - in is electrical energy.

Step8: Identify energy - out for water dispenser

It either heats or cools water, so the energy - out is thermal energy.

Step9: Identify energy - in for electric pencil sharpener

It is powered by electricity, so the energy - in is electrical energy.

Step10: Identify energy - out for electric pencil sharpener

It rotates the blades to sharpen the pencil, so the energy - out is mechanical energy.

Answer:

Example Description	Energy In	Energy Out
Solar Panel Powered Communications Satellite	Solar	Electrical, Radio - wave
Gas Powered Grill	Chemical	Thermal
Water Dispenser	Electrical	Thermal
Electric Pencil Sharpener	Electrical	Mechanical