explain what additional information you would need to calculate the mechanical energy of a book that was lifted to a height of 3.0 meters. in your answer, write out any formulas you need to compute mechanical energy. (please answer this very quickly)

An uplifted block of rock between two normal faults

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?

Select the three ways that the parallel-plate capacitor differs from a car battery.