The radius of the aorta is ~ 10 mm = 10-2 m and the blood flowing through it has a speed ~ 300 mm/s = 0.3 m/s. a capillary has a radius ~ 4×10-3 mm = 4×10-6 m, but there are literally billions of them. the average speed of blood through the capillaries is ~ 5×10-4 m/s. (i) calculate the effective cross sectional area of the capillaries and (ii) the approximate number of capillaries.

Which type of microscope would allow the viewer to see ribosomes inside a cell?

Aphysical change is a change in the size, shape,, or stafe of matter true or false

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?