The average human has a density of 945 kg/m3 after inhalation, and 1020 kg/m3 after exhalation. fresh water has a density of 1000 kg/3, sea water a density of about 1025 kg/m3, and the dead sea (which is actually a lake), a density of about 1230 kg/3. which of the following statements are true?
a. the human body has nearly the same density as salt water after exhaling.
b. the human body will always float in the dead sea.
c. a human would float in fresh water after exhaling

a. The human body has nearly the same density as salt water after exhaling.

b. The human body will always float in the Dead Sea.

Explanation:

According to the concept of floating on the basis of  density, any body that is put in a fluid of density greater than its own density will always float due to the force of buoyancy from the liquid.

where:

density of the fluid

density of the object

volume of the object submerged in the fluid

total volume of the object

jupiter is the largest planet in our solar system, having a mass and radius that are respectively, 318 and 11.2 times that of earth. suppose that an object falls from rest near the surface of each planet and that the acceleration due to gravity remains constant during the fall. each object falls the same distance before striking the ground. determine the ratio of the time of fall on jupiter to that on earth.