A bus is travelling 100km North in two hours and then 60km to east in four hours. Find A. Total distance?
B. Total displacement?
C. Average speed?
D. Average velocity?
E. Instantaneous speed and velocity at 3hours​

Suppose you increase your walking speed from 7 m/s to 13 m/s in a period of 2 s. what is your acceleration?

Wave functions describe orbitals in a hydrogen atom. each function is characterized by 3 quantum numbers: n, l, and ml. if the value of n = 2: the quantum number l can have values from to . the total number of orbitals possible at the n = 2 energy level is .

The diagram shows four locations in the electric field of a positive point charge m. at which location is the electric potential the greatest.