Question

На медный шар объемом 120 см кубических действует сила тяжести 8 половины Ньютона сплошной этот шар или имеет внутри полость

Answer 1

Найдем массу шара, предположив, что он сплошной. Умножим данный объем на плотность. 0,000120*8930=1,076кг. Тогда сила тяжести равна 1,07*9,8=10,5Н. Но в условии сила тяжести меньше, значит масса шара меньше, то есть он с полостью внутри.

Answer 2

Answer:

The force of gravity acting on the copper sphere with a volume of 120 cubic centimeters is 8.5 Newtons. This indicates that the sphere is solid and does not have a cavity inside.

The force of gravity can be calculated using the formula:

F = mg

Where: - F is the force of gravity, - m is the mass of the object, and - g is the acceleration due to gravity.

The mass of the copper sphere can be calculated using the formula:

m = ρV

Where: - m is the mass, - ρ is the density of copper, and - V is the volume of the sphere.

The density of copper is approximately 8.96 grams per cubic centimeter.

Substituting the values, we get: - m = 8.96 g/cm^3 * 120 cm^3 = 1075.2 g

Converting the mass to kilograms: - m = 1075.2 g * (1 kg / 1000 g) = 1.0752 kg

Now, using the value of acceleration due to gravity, which is approximately 9.81 m/s^2 we can calculate the force of gravity: - F = 1.0752 kg * 9.81 m/s^2 = 10.54 N

The given force of gravity is 8.5 Newtons, which is close to the calculated value of 10.54 N. This suggests that the sphere is solid and does not have a cavity inside.

Therefore, based on the given information, the copper sphere with a volume of 120 cubic centimeters is solid and does not have a cavity inside.