Question

Could someone help with these two answers please?

If the air inside a balloon exerts a force of 1.5 N on an area of 0.5 m², what is the pressure inside the balloon?
A. 0.5 N/m²
B. 1.5 N/m²
C. 2.5 N/m²
D. 3 N/m²

As your airplane takes off from an airstrip on the ground and rises 30,000 feet into
the sky, what happens to the air pressure on the outside of the airplane?
A. The air pressure decreases.
B. The air pressure increases.
C. The air pressure stays the same.
D. More information is needed.,

Answer 1

A) pressure = Force/ Area. Pressure = 1.5/0.5 = 3. B) Option A. The air pressure decreases. Since atmospheric pressure decreases with increasing altitude, as the plane soars higher and higher the pressure on the outside decreases since there are fewer air molecules -- the total weight of the air above a unit area becomes increasingly small. As we move higher up earth's surface, there are fewer air molecules than at lower levels; this explains why pressure decreases with increasing altitude.