Is lava a matter if yes how if not how

Because light travels in a straight line and casts a shadow, isaac newton hypothesized that light is

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?

You can decrease the resistance of a length of wire by