Question

An echo is heard on a day when temperature is about 22 degrees celsius will eco be heard sooner or later if the temperature increases to 40 degree celsius

Answer 1

Echo will be heard sooner than the echo heard when temperature was 22°C.

Because speed of sound increases with increase in temperature.

Also, speed or sound in air =Distance/time

If speed of sound increases, then time after which the echo will be heard decreases.

Answer 2

Answer:

AT 40° ECHO WILL HEARD SOONER

Explanation:

At 40° echo will heard sooner because when temperature is high echo will be heard sooner.

therefore, echo is directly proportional to temperature...