It takes 2 seconds for a second wave to travel between two fixed points when the day temperature is 10°C. If the temperature rises to 30°C, the sound wave travels between the same fixed parts in?
A.
1.9 sec
B.
2 sec
C.
2.1 sec
D.
2.2 sec
Answer: Option A
Explanation:
v∝1/√T and t∝1/v t2/t1 = √(T1/T2)=√((273+10)/(273+30))=√(283/303) t2=√(283/303)×2s=1.9s.