Question

Вес тела в воздухе равен 7,8 Н. При погружение в воду на него денйствует выталкивающая сила равная 1 Н. Чему равна плотность тела?

Answer 1

плотность тела равна отношению веса тела в воздухе к весу тела в жидкости, умноженному на плотность жидкости.

7800 кг/м^3

Answer 2

Calculation of Density

To calculate the density of an object, we need to know its weight in air and the buoyant force acting on it when submerged in water.

Given: - Weight of the object in air = 7.8 N - Buoyant force acting on the object when submerged in water = 1 N

The buoyant force is equal to the weight of the water displaced by the object. Therefore, the buoyant force can be calculated using the formula:

Buoyant force = weight of water displaced

To find the density of the object, we can use the formula:

Density = (Weight of the object in air) / (Weight of the object in air - Buoyant force)

Let's calculate the density using the given values:

Density = 7.8 N / (7.8 N - 1 N)

Density = 7.8 N / 6.8 N

Density ≈ 1.147 kg/m³

Therefore, the density of the object is approximately 1.147 kg/m³.