energy changes\nyou have seen a number of examples of energy changes. lets see if you can identify some…
energy changes\nyou have seen a number of examples of energy changes. lets see if you can identify some energy changes on your own.\nfill in exercise\nthere 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.\nexample\ndescription\tenergy in\tenergy out\n1\tblender\telectrical\tmechanical\n2\tsolar panel powered communications satellite\tsolar\telectrical, radio waves\n3\tgas powered grill\tchemical\tthermal\n4\twater dispenser\telectrical\tthermal\n5\telectric pencil sharpener\telectrical\tmechanical
Answer
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 |
|---|---|---|
| Blender | Electrical | Mechanical |
| Solar Panel Powered Communications Satellite | Solar | Electrical, Radio - wave |
| Gas Powered Grill | Chemical | Thermal |
| Water Dispenser | Electrical | Thermal |
| Electric Pencil Sharpener | Electrical | Mechanical |