Elena has two magnets. She puts one under a piece of paper. She holds the other one above it. The magnets attract each other. This shows that

Why do electron microscopes have higher resolving power than light microscopes?

The mantle is made up of which structural zones?

Suppose a force of 60 n is required to stretch and hold a spring 0.1 m from its equilibrium position. a. assuming the spring obeys hooke's law, find the spring constant k. b. how much work is required to compress the spring 0.5 m from its equilibrium position? c. how much work is required to stretch the spring 0.6 m from its equilibrium position? d. how much additional work is required to stretch the spring 0.1 m if it has already been stretched 0.1 m from its equilibrium? a. kequals 600