Read Made-to-Order Magnets. Keep the article open throughout the assignment.
Select the statement that best summarizes the central idea of the article.
Electromagnets are useful in many situations because they can be turned on and off.
Motors change mechanical energy to electrical energy.
Electromagnets work whether or not electricity is passing through the wire.
Electromagnets are useful around the home but not in industry.

Science and technology are interdependent. advances in one lead to advances in the other. give an example of this phenomenon.

Need people build a dam to create a reservoir that supplies water a nearby city needs. describe two ways this action will likely affect the water cycle in the local environment. (5 points) worth 20 points

As part of your daily workout, you lie on your back and push with your feet against a platform attached to two stiff springs arranged side by side so that they are parallel to each other. when you push the platform, you compress the springs. you do an amount of work of 79.0 j when you compress the springs a distance of 0.230 m from their uncompressed length. (a) what magnitude of force must you apply to hold the platform in this position? (b)how much additional work must you do to move the platform a distance 0.230 m farther? (c) what maximum force must you apply to move the platform a distance 0.230 m farther?