Complete these sentences describing various separation processes. Screening and filtering both rely on differences in the
of the particles of the substance you want to filter out of the mixture.

Filtration is generally
, but screening is usually

Could someone . i have tried to solve myself but my calculation is off

Two pans of a balance are 24.1 cm apart. the fulcrum of the balance has been shifted 1.33 cm away from the center by a dishonest shopkeeper. by what percentage is the true weight of the goods being marked up by the shopkeeper? assume the balance has negligible mass. answer in units of %.

Efficiency is the ratio of to for a system a)power in to power in b)power in to power out c) power out to power out d) power out to power in