A pendulum is constructed from a 7.58 kg bowling ball hanging on a 3.00m long rope. The ball is pulled back until the vertical height is 0.877 m. What is the potential energy of the ball?

Give one example to show that when substances are mixed,it may result in a chemical or a physical change depending on the conditions.

Where do magnetic lines of force enter earth?

Why does the equilibrium position of the spring change when a mass is added to the spring? will the mass oscillate around the new equilibrium position of the spring or the previous position without a mass attached to the spring? if the equilibrium position of the spring changes by 20 cm (assuming no initial mass) when a mass is added to the spring with constant 4.9 kg/s^2, what is the mass of the object attached to the spring?