The limit to the eye's visual acuity is related to diffraction by the pupil. D=2.75 mm
dh=1.2 m
a. What is the angle between two just-resolvable points of light for a 2.75 mm diameter pupil in radians, assuming an average wavelength of 550 nm?
b. Take your result to be the practical limit for the eye. What is the greatest possible distance in km a car can be from you if you can resolve its two headlights, given they are 1.2 m apart?
c. What is the distance between two just-resolvable points held at an arm's length (0.800 m) from your eye in mm?

Suppose that two tanks, 1 and 2, each with a large opening at the top, contain different liquids. a small hole is made in the side of each tank at the same depth 1.57 m below the liquid surface, but the hole in tank 2 has 2.49 times the cross-sectional area of the hole in tank 1. (a) what is the ratio ρ1/ρ2 of the densities of the liquids if the mass flow rate is the same for the two holes? (b) what is the ratio rv1/rv2 of the volume flow rates from the two tanks? (c) at one instant, the liquid in tank 1 is 14.9 cm above the hole. if the tanks are to have equal volume flow rates, what height above the hole must the liquid in tank 2 be just then?

Which component of the earth’s atmosphere is decreased due to photosynthesis?

Both speed and velocity measure how fast something is moving. however, since speed is not a it does not require a(n question 6 options: a) quantity , unit b) magnitude, unit c) scalar, direction d) vector, direction