65 816
Assignments Done
99,1%
Successfully Done
In October 2018

Answer to Question #63684 in Other Physics for aastha thapa

Question #63684
people usually prefer knocking at the door instead of speaking to call someone inside a closed room .why ?
Expert's answer
If a man speaks to call someone inside a closed room, then his friend does not hear him because most of the sound waves is reflected and the energy of his sound is not enough to cause vibration of the door. As a result, very less sound passed through the door which causes very less air to cause vibration which may or may not be perceived by person inside room.
But, when we knock at the door, the door is set into vibration which causes the air of the closed room to vibrate and the sound can be easily heard by person inside room.
Hence, people usually prefer knocking at the door instead of speaking to call someone inside a closed room.

Need a fast expert's response?

Submit order

and get a quick answer at the best price

for any assignment or question with DETAILED EXPLANATIONS!

Comments

No comments. Be first!

Leave a comment

Ask Your question

Submit
Privacy policy Terms and Conditions