Recent content by kNYsJakE

  1. K

    Electric field boundary equation implication at air/earth interface

    Suppose the dielectric material is fixed in position and filling the capacitor, and you would have this term in the way of calculating something. \int\nabla\cdot\left[\left(\Delta{D}\right){V}\right]{d}\tau where D is the dielectric displacement Now that turns into (by divergence...
  2. K

    Integrating Electric Displacement

    By the way, this is from pg 192 of Electrodynamics by Griffiths, if this could help..
  3. K

    Integrating Electric Displacement

    Suppose the dielectric material is fixed in position and filling the capacitor, and you would have this term in the way of calculating something. \int\nabla\cdot\left[\left(\Delta{D}\right){V}\right]{d}\tau where D is the dielectric displacement Now that turns into (by divergence...
  4. K

    Schools Where do I find a list of univ/colleges that offers Master's degree in Physics?

    Thanks all for your kind replies. I'm currently in the United States and I'm trying to go to graduate school in US as well. The reason why I am asking if there is a list for the Graduate school that offers master's degree is because I want to get good grades and results during my Master's degree...
  5. K

    Schools Where do I find a list of univ/colleges that offers Master's degree in Physics?

    Thank you very much for you help in advance =)
  6. K

    Motion in One Dimension

    You can also derive the formula that you need. Here is an alternative way to solve this problem. This will help. Given that the acceleration is 9.8 m/s^2 we know that \ddot{x}=9.8 m/s^2 and given that the initial velocity is 12 m/s, we can get \dot{x}=9.8t + 12 and finally...
  7. K

    Independant learning inbetween college and work

    I am an undergrad physics student, and it took me about a month to review those two books over this summer preparing for GRE. It should be plenty of time, and it sounds like a good idea. =)
  8. K

    Ball and chain- (kidding, no chain)

    It depends on the initial height where the balls are dropped and thrown and the velocity (speed & direction) of the ball thrown downward. If you meant throwing the ball in the direction perpendicular to the horizontal ground, you can calculate how fast you should throw the ball downard by using...
  9. K

    Matrix induction

    If a matrix A is given, you probably already had learn that you can set a matrix A as A=QDQ^{-1} where Q is an appropriate matrix and D is a diagonal matrix. Now A^{n}=(QDQ^{-1})(QDQ^{-1})\cdots(QDQ^{-1}) =QD^{n}Q^{-1} It should be pretty straight from this point. I hope it helped =)
  10. K

    Mean free path at low temperatures

    I assume that you know what mean free path is so here is the basic formula for the mean free path: l=\left(\sigma n\right)^{-1} where l is the mean free path, n is the number of target particles per unit volume, and \sigma is the effective cross sectional area for collision. From this I...
  11. K

    Evaluate the difference quotient

    Of course they don't teach difference quotients to 12 years olds. But, they do teach how to plug in values into functions. I didn't mean to criticize or anything. I was just saying that you don't have to think of this problem in a hard way, because all you need to do is just plug in the value...
  12. K

    Spaceship calculus problem

    This is a very straight forward problem. All you need to know is that you get a velocity when you integrate acceleration respect to time. After that, it's all algebra. plug-in, and solve for t.
  13. K

    Evaluate the difference quotient

    This is the very basic thing you should know before you learn derivatives in Calculus. This is just a simple plug-the-value into the function. That means you change x's in function f(x) into x+h to transform the function into f(x) into f(x+h). Give it a try again. You should be able to do...
  14. K

    Linear Transformation problem. Please Help.

    Homework Statement Let \mathrm{V} be a vector space. Determine all linear transformations \mathrm{T}:V\rightarrow V such that \mathrm{T}=\mathrm{T}^2. Homework Equations Hint was given and it was like this: Note that x=\mathrm{T}(x)+(x-\mathrm{T}(x)) for every x in V, and show that...
  15. K

    Velocity of a cursor physics

    People can't help you unless you post your attempted solutions. It's a place where people help you on homework, not do your homework for you.
Top