Recent content by Rick88

From the moment the fuel finishes, only one force acts upon the rocket: gravity. So find the the velocity the rocket possesses after those 7 seconds of propulsion and then use the constant acceleration formulae to find the height at which the rocket has v=0. R.

Just use Newton's Laws to know that a force corresponds to an acceleration. As the elevator moves, a new force is exerted on the man. The direction of this force depends on the direction of motion of the elevator. Does it make sense?

The latent heat is the amount of energy absorbed or emitted by a system during a phase transition (liquid -> solid, say) carried out at constant temperature. You should proceed in calculating what the latent heat is in this instance; then it should be fairly obvious what to do ;) R.

I'm supposed to solve for re for different values of the omegas. so say 0.2, 0.8; 0.5, 0.5 and so on. And the omegas are constant.

Ok, thanks for your suggestion. Right, I need to solve equations (1) and (3) for two omegas only. That is, two of the omegas would be zero, whilst the other non-zero. And the sum of the omegas must always be 1. What I've written so far in Mathematica is: sol = NSolve[r2[z] ==...

Homework Statement hello, I have to solve a couple of equations on Mathematica for a project, and since they are not really working out, I wondered if you could help me out a bit. I need to solve equation (1) (you can find the equations in the .doc attached) and plot the solution for a...

Yeah, that's what I thought, but I am confused about how to find the total probability. An integral or what?

Homework Statement Ok, I'm given a formula for the cross section of the scattering and I've been told that the detector is a column of water of depth 10m. I need to find the probability of the scattering within the detector. Homework Equations σ = E(in MeV) x 1.5x10-44 cm2 The...

Use c=νλ with the values given for the frequency and the speed of light. (ν here is the greek letter "nu", denoting frequency) From this, you'll find the wavelength of the wave. Now, the waves will "hit" the wall and be reflected towards the car again, so the intereference will be costrunctive...

yes, it is right. Just maybe don't leave it as 3800pi/60, but compute the actual value. (But I'm sure you were going to do it anyway)

Because there are two capacitors in the circuit. If you use C=C2 (1e-6), then you are just considering a circuit having *one* capacitor. You basically need to find C to see how the capacitance is split between the two capacitors. That would also give you how the charge is split.

Just use: p=mv and a=dv/dt (and F=ma, of course).

Bave you tried: and ?

It is indeed.

Just look at how the RHS of the two equations below is altered and you will know how to change the LHS as well. N = kg m/s^2 ? = kg m/s