Asound wave travels from air that is at 24 c into air that is 15 c. the sound wave will stay at the same speed slow down speed up

Speed of sound wave slows down.

Explanation :

The speed of the sound wave is given by the following relation :

where,

is the ratio of specific heats.

R is gas constant

T is the absolute temperature.

So, it is clear that the speed of the sound wave is directly proportional to temperature.

If the sound wave travels from high temperature to low temperature, its speed slows down.

Hence, the correct option is (b) " speed slow down ".

.) the observation by semmelweis that more mothers died of childbed fever when their doctors also worked in the morgue