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When the string is cut:Gravitational potential energy is converted to kinetic energy.Kinetic energy is converted to elastic potential energy.Elastic potential energy is converted to kinetic energy (and he...

Consider an object in free fall through the atmosphere. Firstly, we need to consider the forces acting on the object. A force diagram will help here. Weight acts from the centre of mass of the object towa...

Gravitational potential energy is given by equation U = -GMm/r where G is gravitational constant, M and m are masses of two objects and r is the distance betwe...

Temperature is the macroscopic effect of the average kinetic energy of the subatomic particles that compose a material. Kelvins are therefore used because they are the only true scale that connects to thi...

First, we must calculate the amount of time spent using the whisk in one week:4 x 7 = 28 hours a weekNext we calculate the power used; as the whisk has two motors, the average power used by the whole whis...