Which statement is characteristic of a concave lens?

it reflects most light.

it is thickest in the middle.

it bends light rays outward.

it is made of opaque material.

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.

Lightning is an example of what phenomenon? a release of a large amount of energyan absorption of a large amount of energya natural electric circuita natural electric current

An object dropped from cliff falls with a constant acceleration of 10 metre per second square find its speed of two seconds after it was dropped