Is the electric field e in gauss's law, sex da = qenct/e created only by the charge qud? 11) a cube of side (i) is placed in a uniform field e, with edges parallel to the field lines. (a) what is the net flux through the cube? (b) what is the flux through each of its six faces? 12)a point charge q is placed at the center of a cube of side (1). what is the flux through one. face of the cube? 13) state clearly the difference between electrie potential and clectric field

Fft review: linspace, fs, fftshift, nfft 1. generate one second of a cosine of w,-10hz sampled at f, = 100hz and assign it to x. define a tt as your time axis 2. take 64 points fft. 3. as you remember, the dft (which the fft implements) computes n samples of s2t where k-0,1,2, n -1. plot the magnitude of this 64-points fft at range 0 to 63, what do you think of this graph? 4â·to get the x-axis into a hz-frequency form, plot this 64-points fft between-50 to 50 (the 100hz sampling rate) and have n-points between them. 5. according to your figure, what frequency is this cosine wave at? 6. remember that the fft is evaluating from 0 to 2ď€. we are used to viewing graphs from-ď€ to ď€. therefore, you need to shift your graph. 7. now according to your shifted graph. what frequency is this at? 8. note that the spikes have long drop-offs? try a 1024-point dft. note that the peak is closer to 10 and the drop-off is quicker. although, now sidelobes are an issue

Work = force × a. work b. energy c. distance d. momentum

What is the coefficient of kinetic friction μk between the block and the tabletop?