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.
Contents
What is the formula to calculate power?
Power equals work (J) divided by time (s). The SI unit for power is the watt (W), which equals 1 joule of work per second (J/s).
How do you calculate power in watts?
In other words, watt=amp X volt. Sometimes you will see this formula written as W=A X V. For example, if the current is 3 amps (3A) and the voltage is 110V, you multiply 3 by 110, to get 330W (watts). The formula is P=3A X 110V = 330 W (with P standing for power).
How do you calculate the power of 2?
A number, X, to the power of 2 is also referred to as X squared. The number X to the power of 3 is called X cubed. X is called the base number. Calculating an exponent is as simple as multiplying the base number by itself.
How do you calculate power in a circuit?
Electrical power is the product of voltage and current. P=VXI. P = V X I .
What is power write its formula?
P = W / t. The standard metric unit of power is the Watt. As is implied by the equation for power, a unit of power is equivalent to a unit of work divided by a unit of time. Thus, a Watt is equivalent to a Joule/second.
How do you calculate exponents?
The base B represents the number you multiply and the exponent “x” tells you how many times you multiply the base, and you write it as “B^ x.” For example, 8^3 is 8X8X8=512 where “8” is the base, “3” is the exponent and the whole expression is the power.
How do you find exponents?
How to solve for exponents
- xn=y. Take the log of both sides:
- logxn=logy. By identity we get:
- n⋅logx=logy. Dividing both sides by log x: n=logylogx. Find the exponent of a number.
- 3n=81. Take the log of both sides:
- log3n=log81. By identity we get:
- n⋅log3=log81. Dividing both sides by log 3: n=log81log3.
How do you calculate kW?
We find the power in kilowatts P(kW) by dividing the power in watts P(W) by 1,000. Here’s the Formula for Converting Watts Into Kilowatts: P(kW) = P(W) / 1,000.
How do you calculate power consumption?
To calculate power consumption of any appliance, you have to multiply it’s wattage by the number of hours it is being used (operational hours). For example, a 1000 watt electric iron running for one hour will consume (1000 watt X 1 hour) 1000 watt hour or 1 kilowatt hour (kWh) of electricity.
How do you calculate work energy and power?
work done = force × distance moved in direction of force. change in gravitational energy = mgh. power = work donetime taken, power = rate of energy transfer. power = force × velocity.
What is 8 by the power of 3?
512
Answer: 8 to the power of 3 can be expressed as 83 = 8 × 8 × 8 = 512.
What is 9 by the power of 3?
729
Answer: 9 to the power of 3 can be expressed as 93 = 9 × 9 × 9 = 729. Let us proceed step by step to write 9 to the power of 3. Explanation: The two crucial terms used frequently in exponents are base and powers.
What is 5 by the power of 3?
125
Answer: The value of 5 raised to power of 3 is 53 = 125.
What is power in electric circuits?
Electric power is the rate, per unit time, at which electrical energy is transferred by an electric circuit. The SI unit of power is the watt, one joule per second.
What is power and example?
Power is the rate at which work is done. P=Wt. The SI unit for power is the watt (W), where 1 watt equals 1 joule/second (1 W=1 J/s). Because work is energy transfer, power is also the rate at which energy is expended. A 60-W light bulb, for example, expends 60 J of energy per second.
What is power in 10th class?
power is defined as the rate of doing work. power is measured in watt which is equal to jule per second. power can also measure as the product of force and velocity of an object. electric power is defined as the rate of doing work by electricity.
What is the exponent of 36?
62=6×6=36 . (Remember, it’s not just 6×2 .) The 6 is the base and the 2 is the exponent .
Exponents.
| Powers of 2 | Square Numbers |
|---|---|
| 23=8 | 32=9 |
| 24=16 | 42=16 |
| 25=32 | 52=25 |
| 26=64 | 62=36 |
What is the 8th power of 2?
256
Powers of two whose exponents are powers of two
| n | 2n |
|---|---|
| 6 | 64 |
| 7 | 128 |
| 8 | 256 |
| 9 | 512 |
How do you solve power Questions?
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.
How do you solve 2 to the 100 power?
Answer: Value of 2100 = 1.2676506002 × 1030. 2100 = 1.2676506002 × 1030.