Question

P=1000 кило паскаль s=400 см² h=40 см A=?

Answer 1

A = F * S 

F - сила 
S - путь ( 40 см = 0,4 м ) 

F = p * s 

p - давление ( 1000 кПа = 1000000 Па ) 
s - площадь ( 400 см² = 0,04 м² ) 

F = 1000000 * 0,04 = 40000 H 

A = F * S = 40000 * 0,4 = 16000 Дж 

Answer 2

To solve this problem, we need to use the equation:

P = F/A

where P is the pressure, F is the force, and A is the area over which the force is applied.

We are given that P = 1000 kPa (kilo pascals), s = 400 cm², and h = 40 cm. We need to find A.

First, we need to convert the units of pressure from kPa to Pa:

1 kPa = 1000 Pa

So, P = 1000 kPa = 1000 × 1000 Pa = 1,000,000 Pa

Next, we need to find the force F:

F = P × A

We know that the height of the column of liquid is h = 40 cm. The pressure of the liquid at the bottom of the column is given by the formula:

P = ρgh

where ρ is the density of the liquid, g is the acceleration due to gravity, and h is the height of the column.

We assume that the liquid is water, which has a density of 1000 kg/m³. We convert the height of the column from cm to m:

h = 40 cm = 0.4 m

Substituting the values into the formula for pressure, we get:

P = ρgh = (1000 kg/m³) × (9.81 m/s²) × (0.4 m) = 3924 Pa

So, the force F on the bottom of the column is:

F = P × A = 3924 Pa × 400 cm² = 1,569,600 N

Finally, we can solve for A:

A = F/P = 1,569,600 N / 1,000,000 Pa = 1.57 m²

Therefore, the area over which the force is applied is A = 1.57 m².