Oops you're right, I'm sleepy >.< Its g/mL. My bad. That doesn't make any difference in the equation though does it? And yes, I'm assuming separation is in the bottom...this is supposed to be a pretty simple, standard u-tube problem, no tricks...
Homework Statement
A U-shaped tube is partly filled with water and partly filled with a liquid that does not mix with water. Both sides of the tube are open to the atmosphere. If h1 = 0.52 m and h2 = 0.16 m, what is the density of the liquid?
Homework Equations
ρ_{u}=h_{1}/h_{2} *...
velocity increases due to acceleration... a = change in velocity/change in time
so we have a change from zero to 66.4 over the course of 9 seconds
meaning acceleration is 7.4 m/s ?
and i know v = vi + at
so i feel like i could do v= 0 + 7.4*9
giving me 66.4, which is wrong.
ah yes. okay so that means 400 = uy*9 + 1/2 *9.8*9^2
so uy = .34
and i guess i did ux wrong, so ux is actually 600 = ux*9, giving ux = 67
but from here i still don't know how to find the final velocity
u_{y} = 22.6
so if i do square root of 66.4^2 + 22.6^2 I should get my answer but i get 70.1 instead.
how do you find the final based on the x and y components?
Homework Statement
A cannon ball is fired horizontally off the top of a cliff that is
400 m high above the ocean. The ball hits the water 600 m
away. With what speed does the cannon ball enter the water?
Homework Equations
I've tried using
d_{x} = u_{x}*t
d_{y} = u_{y}*t +...