Teaching BPSC बिहार माध्यमिक TGT (9 to 10) शिक्षक भर्ती 4.0 Mock Test Physics Waves Traveling Sound Waves
If a man shouts loudly close to a high flat hill surface at a distance of 100 m from man, how long after the shout will the echo be heard? (speed of sound in air = 330 m/s)
1
6 sec
2
6 min
3
0.6 sec
4
More than one of the above
5
None of the above