A car travels from point a to b along a curved path of semi circle of radius 4m towards east, calculate the distance and displacement of the car moving from a to b? Please if you can.

Ared apple is illuminated by a blue light the apple will appear

Assume that a person skiing high in the mountains at an altitude of h = 15100 ft takes in the same volume of air with each breath as she does while walking at sea level. determine the ratio of the mass of oxygen inhaled for each breath at this high altitude compared to that at sea level. assume that the air composition (i.e. % of air that is oxygen) is the same at sea level as it is at 15100 ft.

When the magnetic domains in a material can be aligned, but eventually drift out of alignment, the material is