Recent content by Say17

Oh you are right. They have different mass.

Yes exactly, because there are two trolleys.

It's the length from beginning of the cube till ground?

Then I have to divide 40 N by 2?

If a force of 50 N pulled to the left and another 50 N force pulled to the right, what would be the net force on the two trolleys? 0 What would happen if you reduced the force to the left from 50 N to 10 N? 40N What would happen if you reduced the force to the left from 10 N to zero? 10 N

I saw this formula somewhere and thought this may work...... So it is 50N - 10N = 40N?

Hi all, I think I have to take the formula for pression. rho = F/A -> rho = ma/A but not sure, how to handle it here. I thought, it should be rho under - rho above = pl*L - pc *a Solution is: pl *g *a

So it means one of them is minus?

Hi all, To find out the tension. First I have to find out the a. 1. step F = ma F = (m1+m2) *a F = (1+3)*a F = 4*a F/4 = a F = 10N + 50 N F = 60 N 60/4 = 15 m/s^2 2.step T =( m1/ (m1 + m2)) * F T = (1/ 1+3) * 60 T = 15 N But the final result is 20N. Thanks for your help!

Hi everyone, I don't know where to start with NaNO3 + NaOH + Zn -> NH3 + Na2ZnO2 + H2O How to balance it or where should I start? Any tricks? Kind regards, Say

Hi everyone, I just don't get it how to compute the following task. First I have to find out many moles are in 27g of Water. H2O = 2*1.01 + 16 = 18.02 27g/18.02 = 1.5mol but afterwards how do I find each elements gram? d is the correct answer.