How do I calculate power?

Power is equal to work divided by time.

In this example, P = 9000 J / 60 s = 150 W . You can also use our power calculator to find work – simply insert the values of power and time.

How do you calculate power in watts?

What are the 3 equations for power?

How do you calculate 2 to the power of 8?

Answer: The value of 2 raised to 8^th power i.e., 2⁸ is 256. Let us calculate the value of 2 raised to 8^th power i.e., 2⁸.

How Do You Solve power questions in math?

To solve basic exponents, multiply the base number repeatedly for the number of factors represented by the exponent. If you need to add or subtract exponents, the numbers must have the same base and exponent.

GCSE Science Revision Physics "Calculating Power"

What is another formula for power?

Power can be expressed as P = Work/Change in Time, instead of P = Change in Energy/Change in Time, because the change in energy is basically the work done.

How do I calculate how much power an appliance uses?

Calculate your energy consumption

If you want to work out how much energy an appliance uses in a day, then all you have to do is multiply the device's wattage by the number of hours you use it. So, if you have a 150W television that's on for five hours of the day, that's 750 watt-hours per day.

How do you calculate work energy and power?

How do you calculate battery power?

Power capacity is how much energy is stored in the battery. This power is often expressed in Watt-hours (the symbol Wh). A Watt-hour is the voltage (V) that the battery provides multiplied by how much current (Amps) the battery can provide for some amount of time (generally in hours). Voltage * Amps * hours = Wh.

How do you find the power of 2?

Method-2: Keep dividing by 2

Keep dividing the number by two, i.e, do n = n/2 iteratively until n becomes 1. In any iteration, if n%2 becomes non-zero and n is not 1 then n is not a power of 2. If n becomes 1 then it is a power of 2.

What is 5 by the power of 3?

Answer: The value of 5 raised to power of 3 is 5³ = 125. Explanation: 5³ = 5 × 5 × 5 = 125. 5³ can also be understood as 5 cubed.

How do you solve 4 to the 4th power?

Let us calculate the value of 4 to the 4th power i.e., 4⁴. Thus, 4⁴ can be written as 4 × 4 × 4 × 4 = 256.

What is 3 by the power of 2?

Answer: 3 raised to the second power is equal to 3² = 9.

How do you calculate watts from volts and amps?

How many watts is 30 amps at 240 volts?

30-amp 240-volt circuit: 30 amps x 240 volts = 7,200 watts.

How do I calculate kWh?

Calculating Kilowatt Hour Rate

The kilowatt-hour rate is the price of power supplied by your electric provider. To calculate your kilowatt-hour rate, divide your total power bill, minus any taxes, by your total power consumption.

How many watts is a watt-hour?

A Watt Hour is a unit of measurement for power over a period of time (an hour), or in our case, a way of measuring capacity. One Watt hour is equal to one Watt of average power flow over an hour.

How is led power calculated?

To calculate an LED's power use, simply multiply the LED's voltage (in volts) by the LED's current (in amperes). The result, measured in watts, is the amount of power your LEDs use. For example, if your LED has a voltage of 3.6 and a current of 20 milliamperes, it will use 72 milliwatts of power.

How do you solve powers in basic science?

Hence, in mathematical terms, power is expressed as: power= workdone or energy expended/time taken. If the workdone is in joules and the time is in seconds, then the power is watts.