When were the planets discovered?
Mercury, Mars, Venus, Jupiter, and Saturn were known from ancient times.
Uranus was discovered in 1781, Neptune in 1846, and Pluto in 1930.
In a blind test of a new drug, the subject does not know if he or she is receiving the drug or a placebo, but the physician administering the test does know. In a double-blind test, neither the subject nor the physician knows.
Connecticut was number one in 1987 with $20,980. At the bottom was Mississippi with $10,204. The average per-capita personal income in the United States as a whole was $15,340.
To galvanize steel means that a zinc coating is applied, either by “hot-dipping” the steel in molten zinc or by electroplating it in an electrolytic process. Thus protected against exposure, galvanized iron or steel is less liable to rust.
The earth was formed 4.6 billion years ago.
German physicist Gabriel Daniel Fahrenheit (1686-1736) took the temperature of an equal ice-salt mixture as the zero for his scale.
The term plasma to a physician means the fluid part of blood, lymph, or milk as distinct from suspended matter. The term plasma to a physicist means a collection of negatively charged electrons and positively charged ions, existing in about equal numbers in a neutral state; plasma is considered a fourth state of matter, distinct…