%displayPrice% at %seller% The Lenovo B50 is a midrange all-in-one desktop PC that's made to keep even enthusiast-level users happy for a few years.
Energy is an amount, while power is a rate at which energy is used. Energy is measured in watt-hours (WÂ·h) or joules (J). Power is measured in watts (W) or joules per second (J/s). Watt-hours are like buckets, and watts are like buckets per hour. If you have 5 buckets of energy and you pour one bucket per hour, you'll be able to pour for 5 hours before you run out.
The joule is the unit of energy in the International System of Units, also known as SI.It measures heat, electricity and mechanical work. It was named after English physicist James Prescott Joule. See the related links for more information.he joule is the unit of energy in the International System of Units, also known as SI.