When did the penny come out?

When did the penny come out?

The Lincoln cent or Lincoln penny is a cent coin (or penny) (1/100 of a dollar) that has been struck by the United States Mint since 1909. The obverse or heads side was designed by Victor David Brenner, as was the original reverse.

What is the boiling point of water at the top of Mount Everest?

The IUPAC recommended standard boiling point of water at a standard pressure of 100 kPa (1 bar) is 99.61 °C (211.3 °F). For comparison, on top of Mount Everest, at 8,848 m (29,029 ft) elevation, the pressure is about 34 kPa (255 Torr) and the boiling point of water is 71 °C (160 °F).

How many pages can you make out of a tree?

Since trees are different sizes, it would be difficult to say how much paper comes from one tree. According to one paper manufacturer, however, a cord of wood measuring 4 feet by 4 feet by 8 feet—or 128 cubic feet—produces nearly 90,000 sheets of bond-quality paper or 2,700 copies of a 35-page newspaper.

What does the number of calories in a food tell you?

A calorie is just a measurement of energy- the amount of energy needed to raise 1 gram of water 1 degree Celsius at standard atmospheric pressure. This makes sense when talking about calories in food. Food provides energy and our bodies need this energy to function throughout the day.

What makes a cat purr?

One hypothesis, backed by electromyographic studies, is that cats produce the purring noise by using the vocal folds and/or the muscles of the larynx to alternately dilate and constrict the glottis rapidly, causing air vibrations during inhalation and exhalation.

Who Burnt Rome?

The great fire of Rome breaks out and destroys much of the city on this day in the year 64. Despite the well-known stories, there is no evidence that the Roman emperor, Nero, either started the fire or played the fiddle while it burned.

Are hedgehogs nocturnal?

Hedgehogs are primarily nocturnal, although, depending on the species, they may be more or less active during the day. The hedgehog sleeps for a large portion of the daytime either under cover of bush, grass, rock or in a hole in the ground.

What does fire in the hole mean?

“Fire in the hole” is a warning that an explosive detonation in a confined space is imminent. It originated with miners, who needed to warn their fellows that a charge had been set.