Question

A balloon is a sphere with a radius of 5.0 m. The force of air against the walls of the balloon is 45 N.

What is the air pressure inside the balloon?

Surface area = 12.56 × radius²

1 Pa = 1 N/m²

Responses

3.6×10−2 Pa
3.6 times 10 to the power of negative 2 uppercase P lowercase a

3.6 × 10² Pa
3.6 × 10² Pa

1.4×10−1 Pa
1.4 times 10 to the power of negative 1 uppercase P lowercase a

1.4 × 10³ Pa
1.4 × 10³ Pa

Answer 1

Area = 12.56 × r^2 = 12.56 × 25 = 314 m².
Pressure = F/A = 45 N / 314 m² ≈ 0.143 Pa ≈ 1.4 × 10⁻¹ Pa.

Answer: 1.4×10⁻¹ Pa.