ThaaDevil need your help!

[Thaadevil]

Yo, So Im in first grade and studdying Sience/Engineering.
We're having this big turn-in-exam-thing and I don't understand a shit..
(He told me I were able to use any source)
And hey the rest of the kids in the class will just ask their parents, but yeaaah that's the problem for me..

I'm willing to exchange in D3 Services/Gold/WoW

If you even just answere 1 question I'm more than happy

(This is not everything we should do, it's about 1/10th from it all but I don't understand a shit from this)

You can find them here;
Save ThaaDevil's life - Pastebin.com

[Thaadevil]

If you have any question feel free to ask me about that

Hehe your name, Well I don't understand any of thoose so just an explanation on any of them would be great

[Thaadevil]

Got help with 7.04 - Thanks Unscrupulous

[Thaadevil]

i am willing to help you,

7.06
Filip and Fredrik lives in the same house, the pressure on the waterpipes for Filip is 400kPa - How big is it for Fredrik that lives 12.5m higher upp?

7.07
Ellen hangs a brass weight on a dynanomometer and it shows 4,0N The weight got the volume 49Cm3. She lowers the weight into vatter with the density of 1,00x10^3/m3, how big is the liftforce of the weight? What does that dynanometer show now?


Would be great <3

[Freefall552]

A: Elephants, unlike humans, walk with two feet on the ground at a time. Each foot is about 40 square inches. Thus, the woman wins by far more than 1,500 psi versus 75 psi.
Humans will only have one foot on the ground while walking. Estimate that the area of the heel on a man's shoe is 10 in 2. When he walks, a 200 lb. man exerts 20 psi because the weight is supported momentarily by the heel. A 100 lb. woman exerts many more psi when she wears heels. Depending on the area of the heel, she can exert as much as 1600 psi under a 'stiletto heel' ¼ inch on a side. This explains why people with wood floors don't want women walking on them in high heels.

B: The airplane will be pushed up by the preasure.

[Confucius]

Confucius has solved all these problems for thaadevil! If you want to see work for these because you are curious you can pm me and I will post them here.