Answer:
d
Explanation:
its not too deep my answer
Answer:
The question was incomplete. Here is the complete question.
Explanation:
A helium-filled balloon escapes a child’s hand at sea level and 20.0C. When it reaches an altitude of 3600 m, where the temperature is 5.0∘C and the pressure only 0.68 atm, how will its volume compare to that at sea level?
The ideal gas equation:

P = absolute pressure
V = Volume of a gas
n = no of moles of a gas
R = ideal gas constant
T = Absolute temperature of a gas
For initial and final states:

= 1.4
Answer is B. Longitudinal Wave
Explanation:
see the above attachment to solve the question and get the answer.
hope this helps you.