What is the temperature on the winter day?
2021-04-16 11:53 pm
On a warm summer day (31 ∘C), it takes 4.60 s for an echo to return from a cliff across a lake. On a winter day, it takes 5.00 s . The speed of sound in air is v≈(331+0.60T)m/s, where T is the temperature in ∘C.
回答 (2)
2021-04-17 2:08 am
-15.6 degrees celsius
2021-04-17 3:31 am
Vs(31) = 331.2*0.6*31 = 350 m/sec
d = 350*4.60 = 1610 m
Vsi = d/ti = 1610/5.00 = 322 m/sec
322 = 331.2+0.6*Ti
Ti = (322-331.2)/0.6 = -15.3°C
d = 350*4.60 = 1610 m
Vsi = d/ti = 1610/5.00 = 322 m/sec
322 = 331.2+0.6*Ti
Ti = (322-331.2)/0.6 = -15.3°C
收錄日期: 2021-04-24 08:49:02
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20210416155322AA24qIu