What is the past tense of I'll
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What problem would a person have if the nucleic acid in one of his or her cells were damaged?

Large helium-filled balloons are used to lift scientific equipment to high altitudes. what is the pressure inside such a balloon if it starts out at sea level with a temperature of 10.0ºc and rises to an altitude where its volume is twenty times the original volume and its temperature is – 50.0ºc ?

Iwould appreciate if someone could me.