You venture out on a cold winter morning to warm up your vehicle. you have layers of cotton/polyester blend clothes on and from walking on carpeting you have accumulated a net negative charge. your car is considered a neutral conductor. as you place your hand near the door handle (without touching it) what happens to the charges of your car?

How is sound energy produced a. vibrating objects b. objects being heated c. temperature differences d. stationary objects

A100-watt light bulb illuminates a solar cell. the electricity from the solar cell operates a water pump that delivers 1 watt of power. what is the efficiency of the system?

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?