Solve the crossword puzzle. Use the given clues to arrive at the right answer

An object weigh 40n in air ,weigh 20n when submerged in water, and 30n when submerged in a liquid of unknown liquid density. what is the density of unknown of liquid?

Consider a system with two masses that are moving away from each other. why will the kinetic energy differ if the frame of reference is a stationary observer or one of the masses?

Acoil suspended freely, points in some direction when no current is passed through it . can you tell what will happen when a current is passed though it?