Question

Write any two condition to here an echo. write any two examples of conductor .inhead light of a school bus 5a current flow when the potential difference is 6v .calculate the resistance of the head light.

Answer 1

Answer:

Examples of conductor: Silver, Copper

The conditions necessary for hearing the echo:

The human ear can not distinguish between two successive sounds if the period between them is less than 0.1 second , Wide and big reflecting surface must be presented to hear the echo such as the walls , the mountains or the water bodies .

Answer 2

Answer:

hhn ha

Explanation: