Question

На столе стоит сплошной медный куб, какова масса куба если он оказывает на стол давление 8кПа

Answer 1

Д ано     P =8000 Па   p=8,9 г/см3=8900кг/м3    m-?
1 найдем высоту куба   из  P = p*g*h
h=P/g*p=8000/9,8*8900=0,1 м=10см
2 найдем объем куба  V = h^3=1000см3
3 Найдем массу  m=p*V=8,9*1000=8900г=8,9 кг

Answer 2

Calculating the Mass of the Copper Cube

To calculate the mass of the copper cube, we can use the formula for pressure:

Pressure (P) = Force (F) / Area (A)

Given: - Pressure (P) = 8 kPa - Area (A) = the area of the base of the cube

We can rearrange the formula to solve for force:

Force (F) = Pressure (P) × Area (A)

Now, to find the mass of the cube, we can use the formula:

Force (F) = Mass (m) × Acceleration due to gravity (g)

Rearranging the formula to solve for mass:

Mass (m) = Force (F) / Acceleration due to gravity (g)

We can use the value of acceleration due to gravity, which is approximately 9.81 m/s^2.

Calculation Steps

1. Calculate the force exerted by the cube on the table using the formula: - Force (F) = Pressure (P) × Area (A)

2. Use the calculated force to find the mass of the cube using the formula: - Mass (m) = Force (F) / Acceleration due to gravity (g)

Calculation Using Given Pressure and Area

Using the given pressure of 8 kPa and the area of the base of the cube, we can calculate the mass of the copper cube.

Please note that the specific area of the base of the copper cube is not provided in the search results. Therefore, without the specific area, it is not possible to calculate the mass of the copper cube accurately.

If you have the specific area of the base of the copper cube, please provide it, and I can help you calculate the mass using the given pressure.