A manometer containing mercury is connected to a pipeline. Water is flowing through the pipeline. If the manometer reading Rm = 4 ft and height of point B is 6 ft above point A, then find out the pressure in the pipe in psi.

An electric hot water heater consumes 3.1 kilowatts of electricity and converts it to heat. How long will it take the water heater to heat a 67 gallon tank of water from 10 degrees Celsius to 50 degrees Celsius? (1 kilogram of water is 0.37 gallons, 1 Calorie = 4200 J).  It may be helpful to refer back to the weekly handout for guidance on this problem. Your final answer should be in minutes (rounded to the nearest 10 minutes).

The attached answer was provided for the attached question. The equation uses the given temperature in celcius and the answer is also given in celcius. The temperature was used in the equation without converting from F and the answer was supposed to be in F. I am worried that even if I converted the answer to celcius that it would be correct because temperature was used in the equation using the incorrect unit.

Please ANSWER ALL of the given questions.    I will rate you with “UPVOTE/LIKE” if you answer every question.   I will rate you with “DOWNVOTE/DISLIKE”, if you don’t answer every question.   THANK YOU.

I need help. And please, could you give me step by step?

Please show work for all these answers and a clear and short explantion of each one