True or false: 1.Gravity is the weakest universal force, but it is the most effective over long distances.

True or false:

2.An artificial satellite in a low orbit will slow down and lose altitude due to the pull of Earth's gravity.

True or false:

3.Electromagnetic force is associated with charged particles.

Assume that a person skiing high in the mountains at an altitude of h = 15100 ft takes in the same volume of air with each breath as she does while walking at sea level. determine the ratio of the mass of oxygen inhaled for each breath at this high altitude compared to that at sea level. assume that the air composition (i. e. % of air that is oxygen) is the same at sea level as it is at 15100 ft.

Find the magnetic field a distance r from the center of a long wire that has radius a and carries a uniform current per unit area j in the positive z direction.

Most short-period comets do not have randomly oriented orbits because