The Town hall building is situated close to Boojho’s house. There is a clock on the top of the Town hall building which rings the bell every hour. Boojho has noticed that the sound of the clock appears to be much clearer at night. Explain. Open Answer »
We have a stringed musical instrument. The string is plucked in the middle first with a force of greater magnitude and then with a force of smaller magnitude. In which case would the instrument produce a louder sound? Open Answer »
An alarm bell is kept inside a vessel as shown in the figure below. A person standing close to it can distinctly hear the sound of alarm. Now if the air inside the vessel is removed completely how will the loudness of alarm get affected for the same person? Open Answer »
Two astronauts are floating close to each other in space. Can they talk to each other without using any special device? Give reasons. Open Answer »
Suppose a stick is struck against a frying pan in vacuum. Will the frying pan vibrate? Will we be able to hear the sound? Explain. Open Answer »
We have learnt that vibration is necessary for producing sound. Explain why the sound produced by every vibrating body cannot be heard by us. Open Answer »
