At the bottom of the hill Mary was traveling 12 m/s on her bicycle and drove into a 1 meter ditch. What was Mary and her bicycle's GPE just before falling into the ditch?

If an atom contains 11 protons in its nucleus, predict the element with the atomic number and electronic configuration. will the number of electrons remain the same during the chemical reaction in such an atom? explain.

What is the speed of an object at a given moment?

What are some properties of transverse waves?