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Author Question: Which of the following materials has an the highest R value per inch of thickness? A) Rigid foam ... (Read 26 times) |
In 1844, Charles Goodyear obtained the first patent for a rubber condom.
Cocaine was isolated in 1860 and first used as a local anesthetic in 1884. Its first clinical use was by Sigmund Freud to wean a patient from morphine addiction. The fictional character Sherlock Holmes was supposed to be addicted to cocaine by injection.
Increased intake of vitamin D has been shown to reduce fractures up to 25% in older people.
There are more nerve cells in one human brain than there are stars in the Milky Way.
When blood is deoxygenated and flowing back to the heart through the veins, it is dark reddish-blue in color. Blood in the arteries that is oxygenated and flowing out to the body is bright red. Whereas arterial blood comes out in spurts, venous blood flows.