What is the pressure force of sunflower oil on the bottom of a 15cm2 bottle if the oil level is at a height of 20cm?

S = 15 cm2 = 0.0015 m2.

h = 20 cm = 0.2 m.

ρ = 920 kg / m3.

g = 9.8 m / s2.

R – ?

Sunflower oil presses on the bottom of the bottle by the force of its weight P. Let us find the weight of sunflower oil P in the bottle by the formula: P = m * g, where m is the mass of sunflower oil, g is the acceleration of gravity.

We express the mass of oil m by the formula: m = V * ρ, where V is the volume of oil in the bottle, ρ is the density of sunflower oil.

Let us express the volume of oil in bottles V by the formula: V = S * h, where S is the area of ​​the bottom of the bottle, h is the height of the oil in the bottle.

The force of oil pressure on the bottom of the bottle will be determined by the formula: P = S * h * ρ * g.

P = 0.0015 m2 * 0.2 m * 920 kg / m3 * 9.8 m / s2 = 2.7 N.

Answer: the force of oil pressure on the bottom of the bottle is P = 2.7 N.