Nobody sensible measures vegetables in quarts
5 pounds of diced onions would take 5 pounds of whole onions chopped up.
A quart of water weighs approximately 2.086 pounds.
15 pounds of carrots.
That is 2 pounds of tomatoes
an average person eats 901898 pounds of carrots a year.
You need about 193 pounds of carrots.
That is approximately 8.2 cups
How many pounds of what?
It depends on how big the carrots are. It won't be the same each time. You can have big, heavy carrots and small, light carrots.
How many bell peppers does it take to make a quart
An average gallon of paint weighs about 10 pounds. Figured at four quarts to the gallon, a quart of paint weighs in at about 2.5 pounds.
roughly 2 pounds per quart