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mod15-H20
properties of H2O
Question | Answer |
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Buoyancy . | Archimedesʼ principle states that there is an upward force on the body when immersed in water equal to the amount of water that has been displaced by the body |
Buoyancy The ability to | float in water results from the body possessing a specific gravity less than that of water. |
Hydrostatic pressure | Water exerts pressure that is perpendicular to the body and increases in proportion with the depth of immersion. |
Resistance | Water molecules tend to attract to each other and provide resistance to movement of the body in the water. |
Resistance by water | increases in proportion to speed of motion. |
Specific Gravity | The computation for the specific gravity of water is equal to 1. |
The human body varies based on size and somatotype but typically has a specific gravity of | less than 1 (average .974). Therefore, a person will generally float when fully submerged in water. |
The specific heat is the | measure of the ability of a fluid to store heat. |
specific heat is calculated as | the amount of thermal energy required to increase the fluidʼs temperature by one unit. |
Water can store four times the heat | as compared to air. |
Waterʼs thermal conductivity is approximately | 25 times faster than air at the same temperature. |
The total drag force | is comprised of profile drag, wave drag, and surface drag forces. |
total drag force is a | hydromechanic force exerted on a person submerged in water that normally opposes the direction of the bodyʼs motion. |