How many liters will a washing machine use?

depends on the washing machine. best is to look at the back of it where there will be a panel that tells you. Mine uses 1200 Watts

In science class at school we had to do research about household daily water use and an average washing machine uses 55 gallons per load, unless you have a high efficiency model.

Everyone with clean underware.

yes, but you make sure the bleach product has the HE logo on the label somewhere

Depends on the washing machine. You need to be more specific, different models, especially older ones, will use much more than a newer, energy star certified one.