Fifteenth Amendment ratified. The Fifteenth Amendment to the U.S. Constitution gave the vote to all male citizens regardless of color or previous condition of servitude. Joseph H. Rainey, first black member sworn in as member of U. S. House of Representatives. December 12, 1870.
The average density of the human body is 985 kg/m 3, and the typical density of seawater is about 1020 kg/m 3.a) Draw a free-body diagram of a human body floating in seawater and determine what percentage of the body's volume is submerged.b) The average density of the human body, after maximum inhalation of air, changes to 945 kg/m 3.) Draw a free-body diagram of a human body floating in seawater and determine what percentage of the body's volume is submerged. b) The average density of the human body, after maximum inhalation of air, changes to 945 kg/m 3.
Over the range of sizes we usually encounter for average people, blood accounts for approximately 7% of body weight. And the density of whole blood, again on average, is about 1.06 grams/ml. So, for example, if a person weighs 185 pounds, this converts to about 84 kilograms body size. Taking 7% of this gives 5.87 kg of blood. Since blood has a density 6% greater than water, this gives a total of 5.54 liters of blood, or 11.7 pints. It is easy to look at this as a formula, based on a person's ...