Average weight of a washing machine?
A front loader weighs about 200 pounds (90kg), and a top loader slightly less.
The pulsator of a washing machine is for washing small-sized or light weight clothing items. The articles are placed in the washing machine where the pulsator subjects them to a relatively small forces to keep small-sized articles from tangling with each other and preventing them from being damaged.
Yes, washing machine is a common noun, a word for any washing machine; a singular, concrete, compound noun, a word for a thing. A proper noun is the name of a person, place, or thing. Washing machines seldom have names. However, the name of the company who makes the washing machine is a proper noun; for example a Kenmore washing machine, a Hotpoint washing machine, a GE washing machine, etc.