Since we are dealing with a wave in a medium, therefore energy is needed to move the mass of the medium.
The source of the energy varies - an earthquake, tapping a drumskin, your vocal chords, the wind on the ocean, a violin string and so on.
A person needs a motor when there is a need for mechanical energy with availability of a power source.
Nuclear energy requires an external source of energy to initiate the nuclear fission or fusion reactions that produce energy. This initial energy input is typically in the form of electricity or another type of fuel to start the chain reaction.
An example is, if you get on a bus, it needs mechanical energy to go to its destination.
A mechanical wave requires a medium to propagate through, such as a solid, liquid, or gas. The wave also needs a source of energy to create disturbances or vibrations in the medium, which are then transferred from one particle to another to propagate the wave. Lastly, the medium needs to have elasticity and inertia to allow the wave to travel through it.
all wave are produced by a source but mechanical waves requires material medium to propagate it e.g is sound wave which is a mechanical wave needs material medium for it's propagation i.e material medium like air molecule,sound travels by vibration of air molecule that's why sound can't travel in a vacuum.....
The form of energy that needs a medium to travel is known as mechanical energy.For example sound needs a medium to travel,that's why sound can't travel in vacuum,light needs no medium to travel it is non mechanical form of energy.
Basically any device that needs to be plugged in so it could move would be an object that endures the transformation from mechanical to electrical energy. Those classroom objects could be a fan or a pencil sharpener.
The ultimate source of energy for everything on Earth is the Sun. Plants convert solar energy into chemical energy through photosynthesis, which is then transferred through the food chain to other organisms for their energy needs.
Energy in humans is in the form of ATP molecules (adenosine triphosphate)
Red blood cells (RBCs) primarily rely on glucose for their energy needs. Glucose is metabolized through a process called glycolysis to produce ATP, which is the main source of energy for RBCs to carry out their functions, such as transporting oxygen throughout the body.
Glycogen.
India primarily uses coal as the main source of energy for its needs.