What happens during constructive interference? two waves moving through the same medium add their effects one wave prevents another from moving through the same medium two waves produce two more waves waves moving in opposite directions cancel each other out

Which feature of a heating curve indicates a change ofn state

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

Two students, each riding bicycles, start from the same apartment building and ride to the same building on campus, but each takes a different route. the first student rides 1100 m due east and then turns due north and travels another 1430 m before arriving at the destination. the second student heads due north for 1930 m and then turns and heads directly toward the destination.at the turning point, how far is the second student from the destination?