Thursday Warm Up October 30. Why do we use so much electrical energy? A. It will work in a vacuum and underwater B. It can be transformed into light,

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Presentation transcript:

Thursday Warm Up October 30

Why do we use so much electrical energy? A. It will work in a vacuum and underwater B. It can be transformed into light, sound, and kinetic energy C It is quieter than sound energy or light energy D It will work to power our computers

Answer: B. It can be transformed into light, sound, and kinetic energy

Turning the handle of the generator causes the bulb to light up. This device changes what type of energy into what other type? A Mechanical to electrical B Electrical to sound C Thermal to mechanical D Light to thermal

A spring scale is a tool that measures the strength of a force. A student attaches a spring scale to a block as shown below. The student drags the block across a surface by pulling the spring scale. The markings on the scale tell them the number of newton's of force needed to drag the block. How can the student use the spring scale to compare the force of friction between the block and different types of surfaces? A.Pull harder on the Spring Scale B.Pull a bigger block across the surface C.Pull a block a greater distance across the surface D.Pull the same block across two different surfaces

Answer: D. Pull the same block across two different surfaces

The different parts of a typical computer are labeled in the picture below. Suppose you want to use the computer to make a graph or type a summary. Which part of the computer changes electrical energy into light energy so you can complete the graph or summary? A.Central Processing Unit (CPU) B.Keyboard C.Monitor D.Printer

Answer: C. Monitor

Which of these is the best conductor of electricity? A Glass rod B Cotton string C Plastic tubing D Copper penny

Answer: D. Copper penny