Question 6 (1 point) A bell is ringing inside of a sealed glass jar that is connected to a vacuum pump.
Initially, the jar is filled with air but the air is slowly removed from the jar by the
pump. What will you hear after ALL of the air is pumped out?
5
The frequency of the sound increases to produce a higher pitch sound,
No sound is heard as the medium carrying sound waves has been pumped out.
No change occurs.
The frequency of the sound decreases to produce a lower pitch sound.

Neptune is the eighth planet from the sun. it was the first planet to get its existence predicted by  mathematical calculations  before it was actually seen through a telescope on sept. 23, 1846. irregularities in the orbit of  uranus  led french astronomer alexis bouvard to suggest that the gravitational pull from another celestial body might be responsible. german astronomer johann galle then relied on subsequent calculations to   spot neptune via telescope. previously, astronomer galileo galilei sketched the planet, but he mistook it for a star due to its slow motion. in accordance with all the other planets seen in the sky, this new world was given a name from greek and roman mythology — neptune, the roman god of the sea.