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.
The human skeleton weighs about 14% of the total body mass. The average human adult skeleton consists of 206 bones.. An average human skull weighs 2.2 pounds (lbs.) Bones are very light .The skeleton weighs less than 20 pounds. In an adult, the skeleton comprises around 20% of the total body weight. The average weight of an adult is approx. 75.3 kg so in an adult the skeleton comprises around 15 kg or 26 pounds. This weight of course varies depending on height, sex, and body weight.