Which condition is correct for an "ideal frictionless" machine?

work output = 0
work input = 0
work input = work output
work > work output

When making french onion soup, how do you prepare the onions? a.sweat and caramelize b.burn c.steam d.caramelize and add mayo e. add no stock.

What is the hormone in your brain that makes you feel happy?

According to myplate guidelines, grains should make up (less than one-fourth, more than one-fourth, about one-fourth) of your plate, fruits should make up (less than one-fourth, more than one-fourth, about one-fourth) of your plate, protein should make up (less than one-fourth, more than one-fourth, about one-fourth) of your plate, and vegetables should make up (less than one-fourth, more than one-fourth, about one-fourth) of your plate.just answered it; about one-fourth, less than one-fourth, about one-fourth, and more than one-fourth