Question

Why do children playing near railway tracks put their ears on the rails ? What do they hear?​

Answer 1

Explanation:

aew results sound waves travel fastest through solids such as a length of string then through gases like yeah that is why we put our near to a person just to hear their heart beats and curbo is in old movies put their year on the railway tracks to sense the vibration of a far off train

Answer 2

Answer:

hi, this is your answers. which std? ?