When was nitroglycerin invented?

When was nitroglycerin invented?

The Italian chemist Ascanio Sobrero first made nitroglycerin in 1847, by adding glycerol to a mixture of concentrated nitric and sulfuric acids. Sobrero’s face was badly scarred due to an explosion in the 1840s.

How much does the average train weigh?

A freight train weighs MUCH more then 1000 tons. A loaded grain train with 112 cars on average is about 15,000 tons. Loaded coal trains can be as heavy as 20,000 tons.

Is north America and south America one continent?

Depending on the convention and model, some continents may be consolidated or subdivided: for example, Eurasia is most often subdivided into Europe and Asia (red shades), while North and South America are sometimes recognized as one American continent (green shades).

How long is the border between Canada and the United States?

According to the U.S. Geological Survey (USGS), the length of the International Boundary line of the U.S.-Canadian border, excluding Alaska, is approximately 3,987 miles, while the length of the U.S.-Mexican border is estimated at 1,933 miles. The length of the Alaska-Canada border alone is 1,538 miles.

How much money does a gas station make per gallon?

But before you cry foul, you should know that after all the ups and downs in a year, gas stations do not make much money from selling gasoline. After credit card fees and other operating costs, net profit for gasoline sales averages 3 cents a gallon, according the National Association of Convenience Stores.

Can a lobster live forever?

Although they are still susceptible to death by disease or attacks, lobsters can theoretically live forever because getting older does not raise their chance of dying. An enzyme known as telomerase prevents the DNA in lobsters’ cells from being damaged as they are replicated, scientist Simon Watt reports in The Sun.

How fast was the meteor that killed the dinosaurs?

Scientists calculate that it was blasted into Earth by a 10-kilometer-wide asteroid or comet traveling 30 kilometers per second — 150 times faster than a jet airliner. Scientists have concluded that the impact that created this crater occurred 65 million years ago.

Are noodles a type of pasta?

Spaghetti and fettuccine are both noodles and pasta. Rice noodles like ramen are noodles but not pasta. All noodles are pasta, all pastas are not noodles.