Question

Помогите решить задачу!! В цистерне, заполненной нефтью на глубине 3 м имеется кран, площадь которого 30 см квадратных. С какой силой давит нефть на кран? Очень срочно!!! Помогите решить!!

Answer 1

Дано:

h = 3 m;g = 10 H/кг

S = 30 см² = 0.0030 м²

p = 0.8 × 10³ кг/ м³

------------------------------------------------------

F = ?

Решение:

F = p × S

                     } → F = p h g × S =

P = pgh

= 0.8 × 10³ кг/м³ × 10 H/кг × 3 м × 0.00030 м² = 72 H

Ответ:

525*. 72 H.

Answer 2

Calculation of the Force Exerted by Oil on the Valve

To calculate the force exerted by the oil on the valve, we need to use the formula:

Force = Pressure x Area

In this case, the pressure is the pressure exerted by the oil at a depth of 3 meters, and the area is the area of the valve.

Calculation of Pressure

The pressure exerted by a fluid at a certain depth can be calculated using the formula:

Pressure = Density x Gravity x Depth

In this case, the density of oil and the acceleration due to gravity are constant values.

Calculation of Area

The area of the valve is given as 30 square centimeters.

Now let's calculate the force exerted by the oil on the valve.

Calculation Steps:

1. Convert the depth from meters to centimeters. 2. Calculate the pressure exerted by the oil using the formula mentioned above. 3. Calculate the force exerted by the oil on the valve using the formula mentioned above.

Step 1: Convert Depth to Centimeters

The depth is given as 3 meters. To convert it to centimeters, we multiply by 100:

Depth = 3 meters x 100 = 300 centimeters

Step 2: Calculate Pressure

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

Pressure = Density x Gravity x Depth

Since the density of oil and the acceleration due to gravity are constant values, we can substitute them into the formula:

Pressure = Constant x Depth

Step 3: Calculate Force

The force exerted by the oil on the valve can be calculated using the formula:

Force = Pressure x Area

Substituting the calculated pressure and the given area into the formula, we can calculate the force.

Now let's perform the calculations.

Calculation:

1. Convert the depth to centimeters: - Depth = 3 meters x 100 = 300 centimeters

2. Calculate the pressure: - Pressure = Constant x Depth - Since the constant values are not provided, we cannot calculate the exact pressure.

3. Calculate the force: - Force = Pressure x Area - Since we don't have the exact pressure value, we cannot calculate the exact force.

Unfortunately, without the specific values for the density of oil and the acceleration due to gravity, we cannot provide an exact answer to the question. To calculate the force exerted by the oil on the valve, we need these specific values.

If you have any further questions, please let me know.