A substance a wave travels through
is called a(n)

A. Solution
B. Medium
C. Matter
D. Element

B.
C
U
Gas

An observer that stands still as the electron moves by him, will observe

Aquantity of gas has a volume of 1.5 m3 and an absolute pressure of 95 kpa. when the gas is compressed to a volume of 0.5 m3, what is the new absolute pressure of the gas? (assume that there’s no change in temperature.)

Assume similar data for the motion of the blood in your aorta. estimate how many beats of the heart it will take the blood to get from your heart to your brain. (assume that the distance from your heart to your brain is 30 cm)