How many chambers does a human heart have?

How many chambers does a human heart have?

The heart has four chambers: two atria and two ventricles. The right atrium receives oxygen-poor blood from the body and pumps it to the right ventricle. The right ventricle pumps the oxygen-poor blood to the lungs. The left atrium receives oxygen-rich blood from the lungs and pumps it to the left ventricle.

What was the highest denomination of United States currency ever produced?

The largest denomination of currency ever printed by the Bureau of Engraving and Printing (BEP) was the $100,000 Series 1934 Gold Certificate featuring the portrait of President Wilson.

Which animal has the fastest metabolism?

In fact, no animal has a faster metabolism—roughly 100 times that of an elephant. Hummingbirds burn food so fast they often eat 1-1/2 to 3 times their weight in nectar and insects per day.

When were hurricanes named?

Forecasters begin using names in 1950. In that year and in 1951, names were from the international phonetic alphabet in use at the time – Able, Baker, Charlie, etc. Female, English-language names were used beginning in 1953. Alternating male and female names were first used to name Atlantic Basin hurricanes in 1979.

How long is the Hadron Collider tunnel?

The LHC is the world’s largest and highest-energy particle accelerator. The collider is contained in a circular tunnel, with a circumference of 27 kilometres (17 mi), at a depth ranging from 50 to 175 metres (164 to 574 ft) underground.

How fast does a 22 caliber bullet travel?

Many .22 LR cartridges use bullets lighter than the standard 40 gr, fired at even higher velocities. Hyper-velocity bullets usually weigh around 30 to 32 gr (1.9 to 2.1 g) and can have a muzzle velocity of 1,400 to 1,800 feet per second (430 to 550 m/s).

Who invented the Fahrenheit scale?

Fahrenheit (symbol °F) is a temperature scale based on one proposed in 1724 by the German physicist Daniel Gabriel Fahrenheit (1686–1736), after whom the scale is named.

Why are there 5 rings in the Olympic symbol?

Answer: The Olympic Rings linked together to show everyone getting together for the Olympic Games. And there are five meaning the five varying inhabited continents in the world – Africa, the Americas, Asia, Europe, and Oceania.