Three masses are in a swimming pool filled with water (density 1000 kg/m). All three objects are identical in size (400 cm) but have different densities. Object A floats on the water (density 580 kg/m3), Object B is completely submerged underwater but has a density equal to that of water, and Object C sinks to the bottom (density 3700 kg/m?). Compare the magnitude of the buoyant force on each block:
a. Fa = FB = Fc
b. FA c. FA >FB = Fc
d. Fa e. FA > FB > Fc

Alinearly polarized electromagnetic wave has an average intensity of 196 w/m^2. this wave is directed towards two ideal polarizers (in real polarizers, transmission is also effected by reflection and absorption). polarizer a is oriented with its transmission axis at an angle of θ_1=20.8∘ with the incident electric field. polarizer b has its axis at an angle of θ_2=63.0∘ with the incident electric field. what is the average intensity of the wave after it passes through polarizer a? what is the average intensity of the wave after it passes through polarizer b? suppose that the two polarizers a and b are interchanged. what would the average intensity be after passing through both polarizers?

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

In a simplified model of the human eye, the aqueous and vitreous humors and the lens all have a refractive index of 1.40, and all the refraction occurs at the cornea, whose vertex is 2.60 cm from the retina. what should be the radius of curvature of the cornea such that the image of an object 40.0 cm from the cornea’s vertex is focused on the retina?