If the pressure exerted on the gas in a weather balloon decreases from 1.01 atm to 0.561 atm as it rises, by what factor will the volume of the gas in the balloon increase as it rises? PLEASE HELP

Two friends at different locations want to communicate with each other by sending low energy signals. which of the following methods can they use to communicate? a) produce x-rays using colliding electrons and send them to radios, which capture sound b) send messages using infrared radiation, which travel in the form of waves c) send radio waves through intervening media like radio and television d) produce sound waves using microwaves from heated objects

What is the percentage composition of carbon in the compound ch4

How will the volume of a gas be affected if the pressure is tripled, but the temperature remains the same?