22 résultats pour "energy"

• Energy.

• Work Energy & Power

  Work, energy and power Work, energy and power are words used frequently in everyday life. However, in science (and physics in particular) we need careful definitions which sometimes conflict with everyday usage. Work Work is done when a force moves an object on which it is acting in the direction of the force. We define work formally as follows: Work is done when force F moves its point of application in such a way that some resolved part of the displacement vector s lies along the dire...

• Summary of renewable energies: ENERGY AND HOW DO WE MAKE ELECTRICITY ?

  ENERGY AND HOW DO WE MAKE ELECTRICITY ? Summary What is a non- renewable source ? Most of our electricity comes from power stations that use fossil fuels like coal, oil and gas to generate the electricity. They are called non-renewable sources because you can’t make any more and they will run out. Unfortunately, burning fossil fuels produces greenhouse gases like carbon dioxide (CO2) and methane which may cause global warming. List all non- renewable source. Nuclear fuel Coa...

• Food Chain.

• Turbine.

• Laser.

• Fossil Fuels.

• Conservation.

• Ecology.

• Biodiversity.

• Star (astronomy) - astronomy.

• Interstellar Matter - astronomy.

• Meteorology.

• Global Warming.

• Enrico Fermi.

• Ecosystem.

• Culture.

• Plant - biology.

• Environment.

• Low Power Modes

  I will explain you what are low power modes, how much energy they consume according to two different studies and how is it related to the global warming.  A lot of electricity is used by equipment that aren't performing their primary function. These equipment states are called low power modes, they are neither  completely «on» nor completely «off» as we can see in this figure. Ross and Meier (2000) reports that several international studies have found standby power to be as much as 10% of reside...

• Asia - History.

• Earth (planet).