1.an electric bell is suspended by thin wires in a glass vessel and set ringing. describe and explain what happens if the air is gradually pumped out of the glass vessel.
2. why cannot a sound be heard on the moon. how do astronauts talk to one another on the surface of moon.
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see very simple
1.if air is pumped the bulb we fell down to fill the space and to make the outside and inside pressure equal
2. on moon there is no atmosphere
sound needs a medium to travel
it can travel through any medium except vaccum
and astronauts where helmets which also make the sound absorbed
and they uses transmitted radio to communicate
something just like Walky talkie
they carry a antenna on their back and the mouth piece and the ear piece is fitted on their helmet while communicating the radio waves are sent through one man to their ship then the ship sents the signal to other man
and to the earth. by this they communicate with each other
hope you get it
the name's
KILLER
ACE KILLER
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1.if air is pumped the bulb we fell down to fill the space and to make the outside and inside pressure equal
2. on moon there is no atmosphere
sound needs a medium to travel
it can travel through any medium except vaccum
and astronauts where helmets which also make the sound absorbed
and they uses transmitted radio to communicate
something just like Walky talkie
they carry a antenna on their back and the mouth piece and the ear piece is fitted on their helmet while communicating the radio waves are sent through one man to their ship then the ship sents the signal to other man
and to the earth. by this they communicate with each other
hope you get it
the name's
KILLER
ACE KILLER
follow me
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