In 1919, the 18th Amendment to the U.S. Constitution, which prohibited the sale and manufacture of alcohol, was ratified. It went into effect on January 16, 1920âbeginning the era known as Prohibition.
Because time constant calculations are important, and often needed, it is better to make the definition of the time constant (T) in a CR circuit: THE TIME TAKEN FOR THE VOLTAGE ACROSS A CAPACITOR TO INCREASE BY 63.2% OF THE DIFFERENCE BETWEEN ITS PRESENT AND FINAL VALUES.
Based on temperature data recorded by our plant computer, the time constant (tau) for temperature change following a start is 2 - 3 hours[b] (hourly computed time constant remains in this range for 11 hours which leads me to dimiss starting current as an important factor) . Load was constant during the running period.