If it takes 7 N to stretch a spring 8 cm and if the spring is then cut in half, what force does it take to stretch one of the halves 4 cm?

An electric current in a wire will push or pull on a permanent magnet. which statement best explains how an electric current creates an electromagnetic force on another magnet?

Estimate the schwarzschild radius (in kilometers) for a mini-black hole formed when a superadvanced civilization decides to punish you (unfairly) by squeezing you until you become so small that you disappear inside your own event horizon. (assume that the your weight is 50 kg)

70 give a real life example showing how sensory neurons work with the motor neurons