There are zero watts in 7.5 amps. Watts are the product of amps times volts. W = A x V. As you can see from the equation a voltage value is missing from your question. Once a voltage value is added to the equation you can find the wattage of the device that draws 7.5 amps.
There are zero watts related to 1.8 amps. Watts are the product of amps times volts. The equation that is used to find watts is Watts = Amps x Volts. Insert the circuit voltage into the equation and you will find the circuit's wattage load.
Find the block heater and look for the nameplate on it. It will be in watts. Use the following equation to find the amperage that it draws. Amps = Watts/Volts. The voltage to use for the truck will be 12 volts.
There are zero amps in 6600 watts. Watts are the product of amps times volts. W = A x V. To find amperage use the following equation, A = W/V, so as you can see a voltage value is needed in the equation to result in an amperage.
Multiply the vots by the amps to find the volt-amps. Or divide the volt-amps by the voltage to find the amps.
The value of 4.9 kW is equal to 4900 watts. Use the following equation to find the amperage for your question. I = W/E, Amps = Watts / Volts.
Energy E= Pt = I2Rt give I= square -root(E/Rt)
The equation that needs to be used is I = W/E. Amps = Watts/Volts. Amps = 500/240 = 2.08 amps.
There are .42 amps in 420 mA. Equation 420/1000 = .42 amps
Wire is sized by the amperage that it will carry. 5 kW is 5000 watts. The equation to find watts is W = Amps x Volts. The equation to find amps is Amps = Watts/Volts. As you can see a voltage is needed to calculate the amperage. Once the amperage is stated, the wire size can be given for that particular amperage.
The equation you are looking for is Watts = Amps x Volts.
The equation that you are looking for is I = W/E. Amps = Watts/Volts.