To calculate the change in temperature, subtract the initial temperature from the final temperature. Example: 84.2 degree Fahrenheit - 41 degrees Fahrenheit = 43.2 degrees Fahrenheit. The temperature from morning to afternoon changed by 43.2 degrees Fahrenheit.
It needs 12 volts so it will be the standard modern power supply provides 12 volts of power.
The power in a DC circuit or system. Its unit is the watt. It is equal to the potential difference, expressed in volts, multiplied by the current, expressed in amperes. The power available from a DC power supply. synonym direct-current power.