At measurements or calculations of physical quantities the corresponding units of measure are used. Not to be mistaken, at the solution of tasks or in practical calculations all values usually bring into uniform measuring system. When it is necessary to transfer watts to kilowatts or hours a minutes, questions usually do not arise. But when the kilowatt is required to put clock in kilowatts, additional information is necessary.
It is required to you
Instruction
1. If it is necessary to transfer to kilowatts of the indication of the electric meter which, as we know, are measured in kilowatt-hours, most likely, it is not necessary to translate anything. Just rewrite figures to a counter board. The fact is that in life the kilowatt-hours are very often called just kilowatts. Do not try to explain to elderly people that they are mistaken. Just treat household kilowatts as the abbreviated name of kilowatt-hours.
2. In practice it is necessary to put kilowatt clock in kilowatts when it is necessary to measure electric device power, and there are no necessary measuring devices. To learn the power consumption of the electric device, write down indications of the electric meter. Then switch-off all electric devices including the fridge. Connect the tested device to the power supply network and turn on it. Note time of inclusion and in an hour switch-off the electric device (turn on the fridge). Write down new indications of the electric meter and take away from them former indications. The received difference will be at the same time the number of kilowatts of hours (quantity of the electric power consumed by the device) and number of kilowatts – device power (in kilowatts).
3. If in kilowatts the kilowatt hours not for an hour, and for any interval of time is required, use the following formula: Apartment = Kkvch/Kch, where Kkv – the number of kilowatts, Kkvch – the number of kilowatt-hours, Kch – a number of hours (time during which measurements were performed).
4. Let, for example, it is necessary to determine the average power of all electric devices in the apartment within a day. For this purpose just write down meter readings and time in which these readings were taken. Then exactly in a day again take readings of the electric meter. The difference of these indications will equal to the number of kilowatt-hours. To put these kilowatt clock in kilowatts, divide this number into 24 (a number of hours in day) and receive the average daily power of energy consumption.