a stone 'X' of mass 2kg is at the height of 2m from the ground level. Another similar stone 'Y' of mass 4kg is at the height of 4m from the ground level. What is the difference between their potential energy?

Time remainin52: 42the chart shows data for a moving object.which conclusion is best supported by the information inthe chart? time (s)velocity (m/s

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?

7types of electromagnetic waves from lowest to highest frequency