Jack tries to place magnets on his refrigerator at home, but they won’t stick. what could be the reason?

Alfred pushes on a heavy box, but cannot move it. the box has a lot of inertia motion friction gravity

Under normal conditions, describe how increasing the temperatures effects the solubility of a typical salt

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?