When you push your bicycle up on an incline the potential energy of the bicycle and yourself increses. Where does this energy come from?

When you lift a box from the floor and put it on an almirah the potential energy of the box increases bu there is no change in its kinetic energy. Is it violation of conservation of energy ? Explain. (AS_(7))

An object of mass 2 kg is taken to a height 5 m from the ground (g = 10ms^(-2)) . (a) Calculate the potential energy stored in the object (b) Where does this potential energy come from? (c) What external force must act to bring the mass to that height? (d) What is the net force that acts on the object while the object is taken to the height h ?

When a ferromagnetic material goes through a hysteresis loop, its theremal energy is increased. Where does this energy come from?

When you lift a box from the floor and put it one an almirah the ptotential energy of the box increases, but thre is no change in its kinetic energy. Is it a violation of consevation of energy?

When a block of mass M is suspended by a long wire of length L, the elastic potential energy stored in the wire is 1/2xxstressxx strain xxvolume . Show that it is equal to 1/2Mgl where l is the extension. The loss in gravitational potential energy of the mass earth system is Mgl. Where does the remaining 1/2Mgl energy go ?

Where does the signal in your cell phone come from ?

When a Coolidge tube is operated for some time it becomes hot. Where does the heat come from?

A particle is released from the top of an incline of height h. Does the kinetic energy of the particle at the bottom of the incline depend on the angle of incline? Do you ned any more information to anwer this question in Yes or No?

If one of the two electrons of a H_(2) molecule is removed, we get a hydrogen molecular ion H_(2)^(+) . In the ground state of an H_(2)^(+) , the two protons are separated by roughly 1.5Å, and the electron is roughly 1Å from each proton. Determine the potential energy of the system. Specific your choice of the zero of potential energy.