Common sense and analysis of power and power saving

First of all, we need to know a common sense: If the lamp power is 1000 watts, use it for 1 hour.
Therefore, the power of the appliance is directly related to energy saving, and the less power, the more power is saved.

Unit Description:

One kilowatt hour is equal to 1000 watts / 1 hour, equal to 1000 watts × 3600 seconds = 3600000 watt seconds = 3600000 joules

One joule is one watt second


Electrical work: The work done by current is called electric work.

Electric power: In physics, electric power is used to indicate the speed of energy consumption. The electric power is represented by P, its unit is watt, referred to as watt, the symbol is W.
1KW=1000W
As a physical quantity indicating that the energy consumption is full, the power of one appliance is equal to the power consumed by it in 1 second (1S). If the electric energy "W" is consumed in such a long period of time "t", then the electric power "P" of the electric appliance is P=W/t
Symbol meaning and unit W—electric energy—Joule (J)
T-time-second(s)
P—power of the appliance—Watt (W)

Rated power: The power of the appliance at the rated voltage is called the rated power.

First, the electric power. The amount of energy converted into other forms of energy per unit time is called electric power. The unit is expressed in watts (W), referred to as watt. The amount of electric energy converted into other energy in a period of time is called electric work. Usually called electric energy (Q). Use ''degree'' to indicate 1 degree of kilowatts multiplied by 1 hour. For example, electric light, marked as 60W, that is, the power is 60 watts, this light is lit for one hour, then this light In terms of electric energy, it takes one hour to convert electricity into light and heat. How much is it? Q=W*T 60W*1 hour=0.06 degrees.


Joule: unit of energy, work, heat (J); 1 work of the action point of Newton force moving in the direction of force by 1 meter distance, ie 1J=1N·m

Calories: Calories are also called cards, and 1 card is about 4.182 joules. Kcal = calorie kcal = big card 1 kcal = 1000 card 1 kJ = 1000 joules 1 kcal / 1 kcal / 1 calorie (kcal) = 4.184 kJ (kJ)

Calories of food: black sesame 531 kcal / 100; sesame (white) 517 kcal / 100

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