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.
On average, about 7% of body weight is blood, although that varies based on several factors. At body temperature, blood weighs 2.315 lbs/liter. A healthy adult male who weighs about 15o-180 pounds has an average of 4.7-5.5 liters of blood--roughly 11-12 lbs. Women, however, may have less blood volume. This is due in part to menstrual blood loss, and that men have higher erythrocyte production, stimulated by testosterone.