Why did they put lead in gasoline?

Why did they put lead in gasoline?

Leaded petrol contained a substance known as tetraethyl lead or TEL, a compound of lead in liquid form originally added to petrol to increase its octane rating. A side effect of adding TEL is that a layer of lead compounds forms on the valve faces of the engine, retarding wear.

Which bird is the fastest swimmer?

In flight, the fastest bird is the spine-tailed swift of Siberia which can reach speeds in excess of 100 miles per hour, but the fastest bird in the water is the Gentoo penguin, which swims at about 22 mph. (Watch this video of a Gentoo swimming madly to avoid a pod of hungry orcas.)

Do dogs get cavities in their teeth?

Pets, like their human owners, can get cavities. However, cavities are relatively rare in dogs because dogs’ diets generally are not high in decay-causing sugars. Veterinary dental experts have noticed a mild rise in the incidence of cavities among dogs fed sugary treats.

How many semen can a bull produce in one load?

A bull can inseminate 300 cows from one single ejaculation.

How far away can you see a candle in the dark?

Considering the absolute threshold, the brightness of a candle flame, and the way a glowing object dims according to the square of the distance away from it, vision scientists conclude that one could make out the faint glimmer of a candle flame up to 30 miles away.

What kind of fish is Nemo?

Ocellaris clownfish. Amphiprion ocellaris, also known as the ocellaris clownfish, false percula clownfish or common clownfish, is a marine fish belonging to the family Pomacentridae which includes clownfishes and damselfishes. Amphiprion ocellaris are found in different colors, depending on where they are located.

When did Ohio become a state?

Ohio became a state on March 1, 1803, although no formal declaration was madeuntil 1953, when President Dwight Eisenhower officially signed the documents making it a state, retroactive to the original date.Ohio issometimes called the “Mother of Modern Presidents,” having sent seven Ohioans (both natives and residents)to the White House since 1869.

Do dolphins have hair on their body?

Well, it is true that they are mammals, but dolphins only have hair when they are first born. This hair is found on the top of the rostrum, which is the dolphin’s mouth, and falls out within two weeks. Dolphins do not grow any other hair for the rest of their lives.