Please help: how do I determine the force constant of the spring? Show work please.

Acar travels 40m in 8 seconds find the car speed

An electromagnet is a device in which moving electric chargers in a coil of wire create a magnet.whats one advantage of using electromagnetic in devices

Awave that is traveling fast can be said to have a high a. frequency b. speed c. wavelength d. amplitude e. period f. none of these