Hi all,
I've been following the launch of the first commercial lunar lander, SpaceIL.
Because of its small size, there is not enough fuel for a more direct approach to the moon, so the path they are taking is multiple orbits around the Earth with impulses at the perigee, at each orbit.
As I...
Homework Statement
A pair of parallel conducting plates, each measuring 30 cm X 30 cm, are separated by a gap of 1.0 mm. How much work must you do against the electric forces to charge these plates with ##+1.0 \cdot 10^{-6} C ## and ##-1.0 \cdot 10^{-6} C##, respectively?
Physics for Engineers...
here is how i think about this, and please tell me why it's wrong:
the initial energy is zero. the energy the car has after it has reached the max velocity at some point x along the incline is ##E_{tot}=mgh+F_{drag}x+\frac{mv^2}{2} = mgxsin{\alpha}+F_{drag}x+\frac{mv^2}{2}##.
This energy was...
Given that this is high school level, let's assume a constant acceleration.
Is the power just the force times the average speed?
The engine had to provide enough power against the forces as well as providing kinetic energy.
I am tutoring a student, and this question was given to her. I believe it is not clearly stated and wanted your opinion. I hope this is the best forum for this.
1. Homework Statement
What is the minimum wattage required to accelerate a car of mass m (don't remember the value) from 0 to 28 m/s...
Sorry , I wasn't very specific.
t is the transmission coefficient, obtained from the full solution to the step potential problem.
α=k is just a special caae (the problem has numerical values).
Homework Statement
I am trying to figure out the average penetration depth into a finite step potential, similar to this thread:
https://www.physicsforums.com/threads/qm-barrier-penetration.104641/
But instead of just estimating the depth as ##\frac{1}{\kappa}##, i would like to calculate it...