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.
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 ;)
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...
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.
Your final value is correct.
However, being a magnitude , it should have positive sign.
As for the units, just work them out by what you have in the equation.
I'm sure you know the units of m and v (and you're given them, anyway), so just use those.
Start drawing a diagram showing the...