Physics midterms at 8am tomorrow morning. This in conjunction with a Prof who has no idea how to prepare her class.

Seriously.

I'm in Phys 202 for Engineers and the class makes me want to jump off a cliff (not really, but figuratively). Lenz's Law can just go and not exist anymore. ...But if that happened we might be in some serious trouble.

Why does this class have to be so important for my major?

Oh!....I was going to say a vaccuum......

Gravity!

That sucks!

while gravity does suck (or pull), vacuums do not. Air gets _pushed_ in by the difference in atmospheric pressure.

*walks off cliff*

Please continue........but first, more things that suck:

1) My ex-husband

2) Drinking from a straw

3) Gravity powered tornadoes

4) My vaccuum......

....okay, now, please.....go on.......

Explain this to me.....vaccuums apparently don't "suck" because of some ole' gravity thing or whathave ya.....
but what about blow-jobs?? You don't blow..right?? So is gravity a factor in giving or recieving a hummer?

HEY LILY WE MUST OF HAD THE SAME EX CAUSE MINE SUCKS TOO

Here's to sucky exes, my friend.....

5)can't sleep...up at 3:00 am
6)trip over the cat,going for a pee
7)look outside,it's raining
8)it's the weekend and no place to go

go on....

CHEERS

While I have no doubt that your exes suck, sadly, none of the other things do.
Vacuums don't "suck" because in fact air is being pushed in by the inequality in air pressure.
Same goes for straws w/ drinks. the drink is being pushed into the straw by the air pressure outside the straw being greater than that inside the straw.
Tornadoes too goes along the same lines of atmospheric inequalities. Gravity having next to nothing to do with any of these things.

Though, of course, your vacuum might suck in the metaphorical sense of it not working properly, I wouldn't be able to say.


Though as for why it's called a "Blow job"... I have no idea. Always wondered it myself.

Ok, I'll join in on the list that seems to have formed now...

9)Going to have a nice hearty bowl of cereal in the morning only to find all the milk is gone or has gone bad.

10)wet socks

When you plug the vacuum cleaner in and turn it on, this is what happens:

1. The electric current operates the motor. The motor is attached to the fan, which has angled blades (like an airplane propeller).
2. As the fan blades turn, they force air forward, toward the exhaust port (check out How Airplanes Work to find out what causes this).
3. When air particles are driven forward, the density of particles (and therefore the air pressure) increases in front of the fan and decreases behind the fan.

This pressure drop behind the fan is just like the pressure drop in the straw when you sip from your drink. The pressure level in the area behind the fan drops below the pressure level outside the vacuum cleaner (the ambient air pressure). This creates suction, a partial vacuum, inside the vacuum cleaner. The ambient air pushes itself into the vacuum cleaner through the intake port because the air pressure inside the vacuum cleaner is lower than the pressure outside.

As long as the fan is running and the passageway through the vacuum cleaner remains open, there is a constant stream of air moving through the intake port and out the exhaust port. But how does a flowing stream of air collect the dirt and debris from your carpet? The key principle is friction.

Just so it removes things it needs to, I don't care if it licks things clean..
Hmmmm well then I might find .......

Hmmmm. And all this time I thought there were little tiny gnomes with brooms in there that got p1ssed off when you shock them.

Maybe that's what the whining noises are..

Uj I like your theory best....

Surface tention "SUCKS" at a high velocity of impact.I know Trust me

tension

BILLS------THEY SUCK THE MONEY RIGHT OUT OF THE BANK