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Can water flow through a pipe with no air e.g. a vacuum

Yes. Physical things can still travel through vaccums. Vibrations, like sound, cannot. This is where the phrase "In space, no one can hear you scream" comes from. Sound is just particles in the air vibrating at certain frequencies, in a vaccum there is no air, therefore not sufficient particles to transmit sound.

Water however, yes.

Yes

Yes, that's how nutrients can travel up the verticle tubes in tree trunks.

If there was air in the xylum, they'd only be able to be about 10m tall at most because of the suction power they'd need would be physically impossible otherwise.

Reply 4

Spandy

Original post by Amphiprion

You surely mean w.r.t longitudinal waves?

Reply 5

Jonny360

Original post by dominopezza

Can water flow through a pipe with no air e.g. a vacuum

No, water cannot travel through a vacuum. The much lower pressure would drastically lower it's boiling point and it would turn to steam. So water cannot, but steam could.

Reply 6

lerjj

Original post by Spandy

You surely mean w.r.t longitudinal waves?

Only electromagnietic waves can travel in vacuums. It does not matter whether a wave is longitudinal or transverse- unless they are EM, they need a medium.

But particles can obviously move in a vacuum- how else would the planets be moving?