powers help

As energy is the capacity to do work, power can also be defined as energy consumed in unit tim..

Power - Imagine two students positioned at track A and track B of 100m length shifting 10 bricks from one end of the track to the other end. What is the amount of work done by each one of them? The amount of work done is same but the time taken to perform the work varies. In order to find..

Imagine two students positioned at track A and track B of 100m length shifting 10 bricks from one end of the track to the other end. What is the amount of work done by each one of them? The amount of work done is same but the time taken to perform the work varies. In order to find out the fastest a..

A contractor wishes to lift a load of bricks from the sidewalk to the top of a building by means of a winch. Since we know the expression for work, we can calculate work to be done by the force applied by the winch to lift the load. We are interested in the rate at which it is done, that is, ..

Power of Accommodation - A normal eye can see both the distant and the nearby objects clearly. In the case of the eye, the image distance (v) is fixed as the distance between the eye lens and retina remains the same but the object distance (u) varies. The eye focuses the images of all the..

Absolute alcohol is miscible with petrol but industrial alcohol is not. However, in the presence of benzene, industrial alcohol can be mixed with petrol. This alcohol used for generating power is called power alcohol..

Electricity is produced by converting the potential energy of water (from a height) into the kinetic energy of flowing water. Hydroelectricity or hydroelectric power is produced, when large quantities of water stored in dams at a suitable height, are released to fall from a height. A dyn..

Power is the rate of doing work or in other words, it is the work done in one second. If a current of 'I' amperes flows through a conductor of resistance 'R' ohm for a time 't' seconds when the potential difference across its ends is 'V' volt, then the electric power consumed P..

Electricity is obtained from flowing water. The flow of water is checked by building a dam. The water from the dam is allowed to flow through the tunnels at a high pressure. Turbines convert the potential energy of the water into electricity. About 23,800 MW of energy is generated by hydel pow..

Ability of the lens to converge a beam of light falling on the le..