Each alveolus is surrounded by a network of .

capillaries

arteries

veins

cilia

One day, after pulling down your window shade, you notice that sunlight is passing through a pinhole in the shade and making a small patch of light on the far wall. you see that the patch of light seems to be a circular diffraction pattern. it appears that the central maximum is about 1 cm across and you estimate that the distance from the window shade to the wall is about 3 m. what is (a) the average wavelength of sunlight? (b) the diameter of the pinhole?

Describe uniform velocity and variable velocity in short

How much energy must a refrigerator absorb from 225 g of water so that the temperature of the water will drop from 35°c to 5°c