What are modern zeppelins filled with?

What are modern zeppelins filled with? Modern blimps, like the Goodyear Blimp, are filled with helium, which is non-flammable and safe but expensive. Early blimps and other airships were often filled with hydrogen, which is lighter than helium and provides more lift, but is flammable. What gas is used in the Hindenburg today? U.S. law […]

What makes ichthyology so important?

What makes ichthyology so important? Ichthyology is important because people need fishes for food, and because we still don’t know even basic facts, like how many species of fish there are in the world. Ichthyologists use specimens, fish tanks, and diving gear to study fishes. Why is it important to study fisheries? Small-scale fisheries and […]

What does extraction mean?

What does extraction mean? 1 : the act or process of extracting something. 2 : ancestry, origin a family of French extraction. What does ethnic extraction mean? Nationality is generally restricted to citizenship of a country but ‘national extraction’ refers to past history or previous circumstances as well as citizenship. National extraction means both the […]

How do you get rid of S cyst?

How do you get rid of S cyst? When a cyst must be removed, here are some methods your doctor may use: Drainage. Under local anesthesia, a doctor will make a small incision through which the cyst can be drained. Fine-needle aspiration. For this procedure, a doctor will insert a thin needle into the cyst […]

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