What 2 elements did Marie Curie discover? And Marie was proven right: in 1898 the Curies discovered two new radioactive elements: radium (named after the Latin word for ray) and polonium (named after Marie’s home country, Poland). What are 5 facts about Marie Curie? 5 facts about Marie Curie, chemist, physicist, and Nobel legend She’s […]
Can a mirror start a fire?
Can a mirror start a fire? The likelihood is very, very slim, however; you have the right kind of mirror, it actually can occur,” says Chief Solomon of the West Columbia Fire Department. He says concave mirrors can cause the fires. Can mirror set fire? It started after “sunlight on a mirror caused curtains to […]
How is rock dated?
How is rock dated? To establish the age of a rock or a fossil, researchers use some type of clock to determine the date it was formed. Geologists commonly use radiometric dating methods, based on the natural radioactive decay of certain elements such as potassium and carbon, as reliable clocks to date ancient events. How […]
What is the sound of a gun firing?
What is the sound of a gun firing? Gunfire characteristics A typical muzzle blast generates a shock wave with a sound pressure level (SPL) of 140 dB or louder. A whip-like “snap” or “crack” caused by the sonic boom that occurs as a projectile moves through the air at supersonic speeds. What sound does a […]
Does biodiesel damage your engine?
Does biodiesel damage your engine? Engine wear: short-term engine wear when using biodiesel has been measured to be less than that of petroleum diesel. While long-term tests have not been published, engines are expected to experience less wear in the long run when using biodiesel. Is biodiesel expensive to produce? With this feedstock cost, total […]
What is reverse causality example?
What is reverse causality example? According to Katz (2006), identifying reverse causality is sometimes a matter of “common sense.” For example, a study might find that brown spots on the skin and sunbathing are linked. While it is plausible that sunbathing can cause brown skin spots, it’s highly unlikely that the brown spots cause sunbathing. […]
Which change of state takes place when a gas loses energy?
Which change of state takes place when a gas loses energy? In evaporation, matter changes from a liquid to a gas. In condensation, matter changes from a gas to a liquid. All matter is made of tiny moving particles called molecules. Evaporation and condensation happen when these molecules gain or lose energy. Will water freeze […]
What results when two atoms share electrons?
What results when two atoms share electrons? A covalent bond results when two atoms share electrons. In the case of two hydrogen atoms, each shares its single electron with the other. This sharing allows each to fill its electron shell with two electrons. The pair of shared electrons constitutes a covalent single bond. How many […]
How true is the movie Cool Runnings?
How true is the movie Cool Runnings? Considered one of the best “underdog” sports movies of all time, Cool Runnings (1993) was inspired by the true story of the first Jamaican national bobsleigh team. Did the Jamaican bobsled team ever win a medal? They qualified for the 1994 Winter Olympic Games in Lillehammer, Norway. Critics […]