A students photographs a 18 cm flower so it fills half of 24mm slide. the magnification is?

Matter is needed to transfer thermal energy bya. conductionb. convectionc. radiation d. both a & b.

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?

If two parallel light rays hit a mirror, they will not be parallel to each other after they reflect.