Hel As an airplane rises through the atmosphere, machines cause the pressure inside the
cabin to decrease. Based on your observations from the Can Crush Lab, why is this
change in pressure necessary?
A. Air pressure inside the plane should match the air pressure outside the plane.
B. Air pressure outside the plane should be more than the air pressure inside the
plane.
C. Air pressure outside the plane should be less than the air pressure inside the
plane.
D. Air pressure inside the plane should be less than the air pressure outside the
plane.

d.Air pressure inside the plane should be less the the air pressure outside the plane

the relative atomic mass of an element is the mass of one atom of that element, relative to 1/12th of the mass of a  1212c atom. to convert to an absolute mass in kg, it is necessary to multiply by  1.661×10−271.661×10−27.

the relative atomic mass is roughly equal to the number of neutrons, plus the number of protons, in the nucleus of the atom.

for elements with more than one stable isotope (different types of nucleus with different numbers of neutrons but the same number of protons), the quoted mass is usually the average mass, weighted by the relative abundance of the different isotopes.

yes

no

blue is scattered more than other colors because it travels as shorter, smaller waves. this is why we see a blue sky most of the time.