/sci/ - Science & Math

I hate this thread.
>the plane's engines are on
>turbojets put a thrust on the craft regardless of whatever is happening with the wheels or the wings
>the only force that opposes this thrust comes from bearing friction at the wheels' axels
>bearing friction is incredibly small in comparison to engine thrust, no matter how fast they are spinning or how fast the conveyor is
>so there is a net force on the craft
>net force => acceleration
>acceleration => linear motion
>linear motion => air over wings
>air over wings => lift
Everyone who posts below me is a troll or is actually physically illiterate. Draw a FBD.

The fan will only increase the temperature inside. Stop using that. What you could do is pee in a bottle, then place that pee in the middle of the hot container until it evaporates and you are left with an evaporated pee bottle. Bring the bottle outside. Now crush the bottle, compressing it. The pee with condense, but also it will release some of its enthalpy into the outside air. Bring the bottle back inside and decompress it. It will evaporate again. Repeat. Slowly but surely, you will pump enthalpy out of the container and thus lower the temperature. Pee bottle air conditioning.

>>11127993
Why do people like eat noisily, slurping noodles in the library?
Why do people ask a million inane questions per lecture?
Why do people whip out their laptop in front of you and start browsing bullshit when they should be paying attention?

At least I wash my hands.

>yet another westermarck thread
Why are you so obsessed with this? Are you autistic, by chance? Is there someone in your real like that you are obsessed with?

>>10944587
>undergrads say embarrassing shit
Yes. At least be patient until you get to upper division/non introductory courses.

>general physics 2
>learning about superposition of electromagnetic waves
>know-it-all raises hand
>"Does this have to do with the quantum entanglement of blah blah blah...."
>my professors face when
>same class, different day, having a lab
>same student has gathered a small crowd around him
>lecturing them all about a very difficult, very interesting integral, his all time favorite
>it babby's first gaussian integral
>later that day, I'm in his lab group
>same kid keeps fucking up units, cannot comprehend what I'm talking about when I say a cubic meter is the same as a million cubic cm
>"wtf shouldn't it be a thousand"
>imagine my shock when he is a CS major

>>10946244
Unless you are a pure physics student or in grad school, you usually don't take it