In order to get the most accurate mass measurement, you must __(blank)__. A. select the appropriate graduated cylinder and amount of water to measure the displacement

B. make sure that you have the right formula to measure its volume

C. calibrate your electronic balance properly so that it gives you a zero mark when empty

D. place one end of your measuring tape at the base of your object

c

Explanation:

electronic balance must always be at zero to prevent errors in measured value

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.

hope this ! this is not copied! search it up, it's free of plagiarism!

snell's law

refractve index = sin incidence / sin refraction