If you push with one newton of force and keep it up through a distance of one meter,
then you've expended one joule of energy. It doesn't matter what you're pushing, or
what its mass is.
Any amount of energy you like greater than 0; the larger the amount of energy you give it, the larger the temperature increase will be. Perhaps you should specify by how much temperature you want the gallon of water to increase and you may get a more specific answer.
Technically, once you know the weight of the box and the height of the platform, you can state the amount of"work" or "energy" needed to raise the box onto the platform. But there's no such thing as the power "needed"to do the job.Power is just the rate of doing work. You can calculate the amount of work needed, but it doesn't matter whetherthe work is done slowly or fast ... with low or high power.
Amount needed: 7 times 6p = 42p
-1
Technically, no. However, in this context, yes. It wouldn't actually save energy, but it can lower the amount if energy needed to do a task. For example, if you insulate your house well, you would not need to heat/cool is as aggressively because the hot/cold air would not pass through the walls to the outside air nearly as easily as a house that has no or poor insulation.
Specific heat is the amount of heat needed to melt one kilogram of a substance...heat of fusion
heat of fusion
The amount of energy needed to move an electron from one energy level to another is called a quantum.
The definition of a calorie has to do with the specific haet of water. The gram calorie (abbreviated "cal") is the amount of energy needed to heat one gram of water by one degree celsius (centigrade). The kilogram calorie (abbreviated "C") is the amount of energy needed to heat one kilogram of water by one degree celsius. Thus one C equals one kcal or "kilo calorie" often found on food packs enegry declaration and such. One cal equals about 4.2 Joules which is the scientific standar unit for energy.
Activation energy
Activation energy is the amount of energy needed to start a reaction.
The large calorie, kilogram calorie, dietary calorie or food calorie approximates the energy needed to increase the temperature of 1 kilogram of water by 1 °C.
It is a calorie
It lowers the amount of activation energy needed
activation energy
The activation energy.
Using catalysts the activation energy is lowered.