As of 2019, South African runner, Wayde van Niekerk, holds the world record in 400 m. He was able to maintain an average speed of 9.3 m/s. How long did it take him to run the 400 meters?

Which bonds are found inside a water molecule

What quantity do units represent in value

Friction removes energy from objects in motion. which statement best describes how this works? a) friction transforms ke into thermal energy b) friction transfers thermal energy to ke c) friction transforms te into pe d) friction transforms pe into ke e) friction transfers ke into pe