The center of mass of Earth's atmosphere is: a little less than halfway between the Earth's surface and the outer boundary of the atmosphere near the surface of the Earth near the outer boundary of the atmosphere near the center of the Earth none of the above

near the center of Earth

Explanation:

Earth is the only planet in the solar system with an atmosphere that can sustain virtually all life, this is due to it diverse regional climates.

Assuming there is symmetrical or proportionate distribution of the Earth atmosphere and it is a perfect sphere, one can say that the center of mass of the Earth atmosphere will be at the center of spherical Earth, But since it's not a perfect sphere, the center mass of the earth atmosphere is near the center of the earth.

b. lifting dumbbell weight at 20-degree angle from the body after a 45-degree angle