Question

Ball 2 is in the water 20 cm above Ball 3. What is the approximate difference in pressure between the 2 balls?

A) 2 x 10² N/m²
B) 5 x 10² N/m²
C) 2 x 10³ N/m²
D) 5 x 10³ N/m²

Answer 1

C) 2 x 10³ N/m²

Step-by-step explanation:

The pressure difference between the two balls is due to the difference in water pressure at different depths. The deeper the water, the greater the pressure.

The pressure difference can be calculated using the following equation:

ΔP = ρgh

where:

• ΔP is the pressure difference between the two balls (in N/m²)
• ρ is the density of water (1000 kg/m³)
• g is the acceleration due to gravity (9.8 m/s²)

• h is the difference in depth between the two balls (0.2 m)

Plugging in the values, we get:

ΔP = (1000 kg/m³)(9.8 m/s²)(0.2 m) = 1960 N/m²

≈ 2 x 10³ N/m²

So the answer is C.