Recent content by sarahaha288

Any takers? any advice is appreicated!

Homework Statement I need to calculate dS/dU for a solid when then system is in thermal equilibrium. Na=100 Nb=10 U=20e Homework Equations I rearranged the equation to find that Ds/Du=kb(1/omega)(dOMEGA/dU) The Attempt at a Solution I am not sure how to go about this because I...

Alright, thanks so much!

Homework Statement I am trying to find the angular frequency of an electromagnetic wave given a general wave equation in standard form Esin(kx-wt) I am given the variable k, and i need to find the angular frequency w. I am not sure how to do this without finding the period, which i can't...

I am doing some practice and need help with a problem, I am trying to find the angular frequency of an electromagnetic wave given a general wave equation in standard form Esin(kx-wt) I am given the variable k,, and i need to find the angular frequency w. I am not sure how to do this without...

Homework Statement I need to find the partial derivitives of f(x,y,z)=50-14x+3y^2-2xy (e^z) Homework Equations The Attempt at a Solution i think the x-partial would be -14+2ye^z+2xye^z... but I'm not sure and I'm confused of how to find the others!

No. I think it's 2R now. Thank you... I'm not sure how i overlooked that.

Homework Statement How far would the spot on the photographic plate be from the entry point for each ion, assuming that each ion completes half an orbit? I am given three ions, N+subscript2, O+subscript2, NO+ They have atomic masses of N=14.0031amu and O=15.9949amu. I am given the...

thanks so much! that helped a lot.

The magnetic field for B-Bar is definitely 10MN/C the book says that vector B is in units of tesla which is: (N/C)(m/s^-1)

the B-bar is measured in tesla. and if the electric field vector is the one that is given, how do I find the magnetic field in order to use the equation Fm=mv^2/B if i am trying to solve for v??

Homework Statement electrons emitted by a certain device are observed to travel in a circular path with a radius of 2.0cm when plaves in a uniform magnetic field whose strength is 10MN/C. What is the speed of the elctrons emitted by this device? Homework Equations I know that 10MN/C is...

Homework Statement A spaceship leaves earth, travels to Pluto (which os 5 hours of distance away at the time), and then returns to Earth in exactyly 11 hours later. assume the spaceships acceleration time is very short so it is always traveling at a constant speed. also assume that Earth and...

Homework Statement a car traveling at a constant speed of 20 m/s that is initially traveling due northwast rounds a corner so that after 10s, the car is traveling due northeast. What are the magnitude and direction of the car's average acceleration during this interval of time? Homework...

thanks that helps a lot for the free body diagram, but for the net force diagram i will then have to vectors pointing downward for the normal and the gravitational force. So then would the net force be pointing downward as well? or do i include something about centripetal acceleration in there?