Question

На сколько гранитный булыжник объёмом 40 см3 будет легче в воде,чем в воздухе?Плотность воды=1000 кг/м3. Плотность в воздухе =1,29 кг/м3

Answer 1

0,00004м3×10Н/кг × 1000кг/м3=4Н
0,00004м3×10Н/кг ×1,29кг/м3=?

Answer 2

Calculating the Weight Difference of Granite Pebble in Water and Air

To calculate the weight difference of a granite pebble in water and air, we can use the principles of buoyancy and density.

Given Data: - Volume of granite pebble (V) = 40 cm^3 - Density of water (ρ_water) = 1000 kg/m^3 - Density of air (ρ_air) = 1.29 kg/m^3

Calculations:

1. Weight in Air: The weight of the granite pebble in air can be calculated using the formula: \[ W_{air} = m_{pebble} \times g \] where \( m_{pebble} \) is the mass of the pebble and \( g \) is the acceleration due to gravity (approximately 9.81 m/s^2).

2. Weight in Water: The weight of the granite pebble in water can be calculated using the formula: \[ W_{water} = (m_{pebble} - \rho_{air} \times V) \times g \] where \( \rho_{air} \) is the density of air and \( V \) is the volume of the pebble.

3. Weight Difference: The weight difference between the pebble in water and air can be calculated as: \[ \Delta W = W_{air} - W_{water} \]

Results:

Using the given data and the calculations above, we can find the weight difference of the granite pebble in water and air.

The weight difference will be influenced by the density of the pebble and the difference in densities between water and air.

Let's calculate the weight difference using the given data and the formulas mentioned above.