That depends on the product chosen.
The average time it takes a tankless water heater to provide water for usage is immediate. The water in continuously hot for your usage. The average tankless water heater has a life expectancy for 20 years.
I would prefer to use "distance" instead of "length".distance = speed x time
No set length of time. It depends on what the witness is testifying to and the complexity of the case.
The average length of time the various salts remain in the ocean before cycling out of the ocean is known as the residence time. This is also known as the removal time.
Average speed = (distance traveled during some time) divided by (length of time to travel that distance)
The average length of the day is usually just called "day".
Rates vary on the time, length.
the answer would be Solar TIme
Mean solar time
If the average person's water usage is 30 multiply it by the number of people in the family.
The average watt usage of a refrigerator is typically around 150-200 watts.
The average wattage usage of a refrigerator is typically around 100 to 200 watts.