All of the following noble gases are present in the atmosphere except:

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What is the name of the central part of the earth?

A. Mantle B. Core C. Crust D. None of the above...

Which group of compounds constitute carbohydrates?

A. Sugar and protiens B. Sugar and protiene C. Starch and sugar D. None...

Dysentery is a disease that can lead to severe diarrhea with mucus or blood in the feces caused by inflammation in ?

A: Stomach B: Small intestine C: Colon D: Liver...

Heat Transfer

Heat exchanger tubes are never made of Plain Carbon Steel Stainless Steel Lead Copper...

When a bullet penetrates into a target, the kinetic energy of a bullet is converted into ?

A: Potential energy B: Heat energy C: Chemical energy D: Mechanical energy...