If earth somehow expanded to a larger radius, with no change in mass, how would you're weight be affected? how would it be affected if earth shrunk?

If you touch a hot light bulb and get burned, that is an example of a. radiation b. convection c. conduction

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?

Atoms containing radioactive nuclei are called