Acurrent i travels counterclockwise through a closed copper wire loop which has the shape of a rectangle with sides 'a' and 'b'. what is the magnitude of the magnetic field at the center, c, of the rectangle? express your answer in terms of a, b, i and mu _0. (enter mu_0

What is the final velocity of the initial velocity of 25 and -50?

What is the scientific definition of energy that relates to work

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?