Homework Statement
During an experiment using Soxhlet Method to extract cholesterol from egg yolk, also using dicloromethane as a reagent, we crush half boiled egg yolk and put 80 cm3 of dicloromethane.
Homework Equations
Then comes a question which is assuming the maximum of absorption of...
The angular momentum will variate it self so by saying that, there will be a torque due to the variation and with the torque we can calculate de work of the bullet and by that the kinetic energy of rotation
Homework Statement
A bullet with 5 g of mass and a velocity of 100m/s goes through a disk that was rested initially the disk is solid and as a radius r=20cm. It's 2cm thick and as a 2kg mass that can spin with no friction in an axis that goes through the center. The bullet goes trough the...
So from what I draw I understood that the actual velocity diagram is given by Vc/e = Vr/e + Vr/c but besides that the results that I obtained before were right
Ok so here I am again ready to finish it already.
Since we know that y=Acos(ωt+\phi) so (d2y)/(dt2)=-Aω2cos(ωt+\phi) we can easily get that
-Aω2cos(ωt+\phi)= -(k/m)(Acos(ωt+\phi))
from that expression we obtain that ω2=k/m concluding that ω=√(k/m)
we also know that T=2π/ω=2π√(m/k)...
Vr/c = Vc/e + Vr/e
so by that logic Vr/c = 50/sin(60)
and of course Vr/e = Vr/c cos(60) = (50cos(60))/sin(60)
and that's the answer by this logic right?
Homework Statement
A car travels to east with 50 km/h. It's rainning vertically in relation to the Earth. The raindrops on the lateral windows of the car make a 60 degree angle with the vertical. Determine the velocity of the raindrops in relation to:
a) The Earth
b) The car
Homework...
This might be a REALLY wild guess but where it goes xD
(d2y)/(dt2) = -(K/m)y
so that meand that
dt2 =(d2)y/(-k/m)y the y's disappear so I'll assume now that dt is an aproximation to the period T and that the minus sign before k doesn't really interest us so we'll exclude it therefore...
I've solved it. Now I get the actual S.H.O. equation which is now
(d2y)/(dt2) + (K/m)y = 0
That part I understood but now I want to know why the period of oscillation is T=2π√(m/k)
how do we demonstrate that?
I can't figure it out sorry for wasting your time with this, maybe I'm really...
Ok one problem down, so i'll assume that g isn't relevant since I change variables for the S.H.O. but now how do we prove that the period is in fact the above one?
P.S.
Thanks for welcoming me in here =)
I have a question that's being bugging me around. This might be simple but I can't figure it out. If there's a spring hanging from the ceiling and we want to prove that there's a Simple Harmonic Oscilation then why don't we account for the gravitational force?
The sum of forces equals to mass...