Step 3: Prepare the Spreadsheet. In this tutorial, we will create a very simple macro to change the color, size and boldness of text. In your spreadsheet, type in some text in any of the cells. We will later record a macro to change the formatting of this text.
The average cooling capacity of a dorm fridge is somewhere around 150 BTU/hr, that is, it is capable of moving 150 BTUs of heat in 1 hour, regardless of how efficient (or inefficient) it is in terms of energy usage.
Remember that 250 BTU/hr refrigerator will be able to devote about 175 BTU/hr to cooling the tank, the rest is wasted due to the design of the refrigerator! If seawater weighs 8.5 pounds per gallon, then 75 gallons of seawater weighs 637 pounds.