What is the displacement of a jogger that went 30 m to the east and 40 m to the north? a
2500 m NW
b
2500 m NE
C
50 m NW
d
50 m NE

Iron reacts with sulfur to form iron sulfide. if 60 grams of iron reacts with sulfur to produce 90 grams of iron sulfide, how much sulfur has been used in the chemical reaction?

Which statement correctly describes the relationship between frequency and wavelength?

Which two particles are found in the center of an atom