Energy has been an indispensable part of society. From walking, and driving to charging our smartphones, every action encompasses one or the other form of energy in our day-to-day life. Over the years, mankind has ventured and found new possibilities for harnessing energy for their benefit. ...
When you burn gasoline under ideal conditions, with plenty of oxygen, you get carbon dioxide (from the carbon atoms in gasoline), water (from the hydrogen atoms) and lots of heat. A gallon of gasoline contains about 132x106 joules of energy, which is equivalent to 125,000 BTU or 36,650...
Electric potential is in units of joules (energy) per coulomb (electric charge), so it describes the amount of energy exerted per unit of charge. We can also describe small amounts of energy (often stored as electric potential energy) through a units called the electron volt (eV). This un...
Physics has a specific definition of work – work is done when a force moves an object over a distance. Work is related to energy. It's measured in joules in the SI system., which are also potential and kinetic energy units. To convert work into potential energy, you have to act ...
In science, we say you have to do work against the force of gravity to push the boulder up the hill. Doing work means you have to use energy: the muscles in your body have to convert sugar and fat to make the energy you need to push the boulder. Where does this energy go?
Nanometers measure the length of very small magnitudes, such as wavelengths. A joule, abbreviated as J, is a unit of energy in the metric system. The conversion between nanometers and joules is important in physics because scientists often need to calculate the energy of electromagnetic radiation...
An energy-efficient lamp rated at 10 watts uses 10 joules of energy every second (because 1 watt means using one joule per second), so it would take it 37,800 seconds—about 10.5 hours—to use as much energy as our kettle uses in a single boil!
Electric current travels from point to point because there is a greater electric potential energy on one end of the wire than there is on the other. This is the same sort of principle that makes water under pressure flow out of a hose — higher pressure on one end of the hose pushes ...
Work:Work on an object is the changing of energy on the object. It is force times distance, saying that a force applied for this amount of distance will change the energy of an object by that amount. It is measured in Joules.
How many joules are in a watt? What electrical unit is equivalent to one Joule? Is watt a unit of energy? If you have a 100-watt light bulb, how much energy does it use each minute? What is the unit of electrical potential energy?