Question

Какое давление воды на глубине 35м.? Какое давление производит мальчик массой 52кг, если площадь его подошв 285 м2 ? СРОЧНО! ПОЖАЛУЙСТА!)

Answer 1

Ответ:

Объяснение:

Какое давление воды на глубине 35м?

Дано:

h = 35 м

g ≈ 10 Н/кг

ρ = 1000 кг/м³ - плотность чистой воды

___________

p - ?

Решение:

p = ρgh

p = 1000 · 10 · 35 = 350000 Па = 3,5 МПа

Какое давление производит мальчик массой 52кг, если площадь его подошв 285 м²?

Дано:

m = 52 кг

S = 285 м²

g ≈ 10 Н/кг

________

p - ?

Решение:

p = F / S

F = mg

p = mg / S

p = 52 · 10 / 285 ≈ 1,8 Па

Примечание: во второй задаче у мальчика слишком большая площадь подошв. Поэтому и полученное давление слишком мало. Скорее всего, в условии опечатка и имелось в виду 285 см². В таком случае p = 52 · 10 / 0,0285 ≈ 18000 Па или 18 кПа.

Answer 2

Pressure at a Depth of 35m

The pressure at a given depth in a fluid, such as water, can be calculated using the formula:

Pressure = Density × Gravity × Depth

To find the pressure at a depth of 35m, we need to know the density of water and the acceleration due to gravity.

The density of water is approximately 1000 kg/m³, and the acceleration due to gravity is approximately 9.8 m/s².

Using these values, we can calculate the pressure at a depth of 35m:

Pressure = 1000 kg/m³ × 9.8 m/s² × 35m

Calculating this, we find that the pressure at a depth of 35m is approximately 343,000 Pascal (Pa).

[[1]]

Pressure Exerted by a Boy with a Mass of 52kg

To calculate the pressure exerted by the boy, we need to know the force he applies and the area over which the force is distributed.

The force exerted by the boy can be calculated using the formula:

Force = Mass × Acceleration

The mass of the boy is given as 52kg, and we can assume the acceleration due to gravity is 9.8 m/s².

Using these values, we can calculate the force exerted by the boy:

Force = 52kg × 9.8 m/s²

Calculating this, we find that the force exerted by the boy is approximately 509.6 Newtons (N).

The pressure exerted by the boy can be calculated using the formula:

Pressure = Force / Area

The area of the boy's feet is given as 285 m².

Using these values, we can calculate the pressure exerted by the boy:

Pressure = 509.6 N / 285 m²

Calculating this, we find that the pressure exerted by the boy is approximately 1.79 Pascal (Pa).

[[2]]