According to a simplified model of a mammalian heart, at each pulse approximately 20g of blood is accelerated from 0.25 m/s to 0,.35 m/s during a period of 0.10s. What is the magnitude of the force exerted by the heart muscle?

as we know our atmosphere or air have different levels. every level has other gasses, and every gas has another permeability. when the light comes from lower permeability to higher permeability, it changes its direction. so that means that when the light comes from the moon to the earth, it changes it's direction many more times. it basically means that the shape of the light part of the moon is changed on the earth.

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54 degrees incident angle = reflected angle

angle is from normal turned to line of ray

pythagoras' theorem

square root (-5^2+9^2)

square root (25+81)

square root (106)

angle is tan^-1(9/5)

neg x, pos y