I'm bad at telling when someone is depressed and I feel terrible bc of it... my bf was being dry (not talking much) and I told him to stop replying to me and start talking and then he said ...yet when your depressed I don't complain that ur dry.
I feel like I was being an insensitive jer k...I didn't know he was depressed I thought he was just not talkative bc he might've been busy...I apologized and he said he'd talk to me tomorrow. I should've just asked why he was being dry instead of sounding like a b*** h. I feel like a bad gf :( we've been together over a year yet I still can't tell when he is depressed...

metals are good conductor of electricity. it has free electrons on their surface. according to electron pool theory, each atom present in a metal crystal losses all of its valence electron and as a result a pool of free is form. these pool of electrons are free to move and   conduct electricity easily   while making metal as good conductor.

the correct answer is a. the ability of electrons to flow throughout the metal.

if it's not useful, feel free to report for mistake in answer.

a gas, having a molecular weight of 13 kg/kmol and a kinematic viscosity of 0.25 cm2/s, flows through a pipe 0.25 m internal diameter and 5 km long at the rate of 0.4 m3/s and is delivered at atmospheric pressure.