law of conservation of energy

Hi Students,

Let us learn about "law of conservation of energy"

The law of conservation of energy: The total amount of energy in the universe is constant, although energy can be transformed from one form to another. The basic unit of energy is the joule. A watt is one joule per second. Thus a 100 watt electric bulb uses 100 joules per second of electric energy. That energy must come from somewhere and must be paid for. One pays for electric energy in kilowatt-hours which is 1,000 watts being delivered per hour. Thus a kilowatt-hour is 3,600,000 joules, since "kilo" means a thousand, and there are 3,600 seconds in an hour. At 10 cents per kilowatt hour, a joule is really cheap. 10 joules would lift a one kilogram weight one meter.

Law of conservation of energy states that the energy can neither be created nor destroyed but can be transformed from one form to another.

In our next blog we shall learn about "mitosis and meiosis"

I hope the above explanation was useful.Keep reading and leave your comments.