A cylinder of 50 litre capacity contains helium gas at a pressure of 200 atm and the temperature of 27°c. Assume that all of the gas can be used to fill a ballon which is released in air. At a height of 75000ft the volume of a ballon is 200m³ and its temperature is -53°c. What is the pressure of the gas inside the ballon?

the answer is g1

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brain development. a child's brain undergoes an amazing period of development from birth to three—producing more than a million neural connections each second. the development of the brain is influenced by many factors, including a child's relationships, experiences and environment.

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