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.
Bad link. A modern all electric range will require a 40 or 50A 120/240V electric supply. A gas top/electric oven may be adequate with a 30 or 40A 120/240V supply. An all gas range needs just a 15A 120V supply.