If the car went 30 km west in 25 min. and then 40 km east in 35 min., what would be its total displacement?

What are the applications of electromagnetic waves

Which sound characteristic is not affected by the relative motion of an object

Which of the following correctly describes what happens when an atomic bomb explodes? small pieces of fissionable material are joined and form a body with a mass greater than the critical mass, the relative number of neutrons escaping decreases, and a chain reaction and explosion result. large pieces of fissionable matter are brought together quickly and form a body with a mass smaller than the critical mass, the relative number of escaping neutrons increases, and a chain reaction and explosion result.