Every object with mass exerts a gravitational force on every other object with mass. The gravitational force between which of the
following two objects would be easiest to detect with measuring equipment?
A.
an electron and a bowling ball
OB. the Moon and the Earth
C.
a baseball and a bowling ball
D.
a human and a dog

that tool is called an altimeter which measures your altitude which can be used to tell which atmosphere you are currently in, including the stratosphere.

hope this ! : )

elctricity and magnet is conversion to it

blue light is scattered in different directions by the tiny molecules of air. blue is scattered more than other colours because it has a shorter distance to travel which results in smaller waves. this is why we see a blue sky most of the time.