The body weight is 4.5 N, and its volume is 500 cm³. Will this body drown in water? Alcohol? Kerosene?

The buoyancy force in water, alcohol, kerosene (ρ is the density, V is the volume of the body, g is the acceleration of gravity):

Fv = ρvVg = 1000 kg / m ^ 3 * 0.0005 m ^ 3 * 10 m / s ^ 2 = 5 n;

Fc = ρcVg = 770 kg / m ^ 3 * 0.0005 m ^ 3 * 10 m / s ^ 2 = 3.85 n;

Fк = ρкVg = 810 kg / m ^ 3 * 0.0005 m ^ 3 * 10 m / s ^ 2 = 4.05 N.

The force of gravity is equal in absolute value to the weight of the body:

Ft = 4.5 N.

Fв> Fт;

Ft> Fc> Fc.

The body sinks if the force of gravity is greater than the buoyancy force.

Answer. The body will float in the water; it will drown in alcohol and kerosene.