A 25 N force stretches a spring 0.280 m. What was the spring constant?

Atotal charge of –6.50 µc is uniformly distributed within a sphere that has a radius of 0.150 m. what is the magnitude and direction of the electric field at 0.300 m from the surface of the sphere? a) 2.89 × 105 n/c, radially inward b) 6.49 × 105 n/c, radially outward c) 4.69 × 105 n/c, radially inward d) 9.38 × 105 n/c, radially outward e) 1.30 × 106 n/c, radially inward

If you put a helium-filled balloon in the refrigerator, what will happen?

Using the free-body diagram, calculate the net force acting on the sled. is the sled in a state of dynamic equilibrium?