I think it might be D.) Group 17, period 5. but i'm not entirely sure<span />
28 times stronger than the force of gravity on the surface of the Earth.
Answer:
it could be either or because it doesnt just depend on the height but it also depends on the pressure but then again the question didnt ask anything about the pressure so the answer should be true
Explanation:
Speed of wave is given as
Wavelength of the wave is given as
now from the formula of wave time period we can say
so it will have time period of T = 4 s