Astronauts on a space station decide to use Earth's magnetic field to generate electric current. Earth's B→ field in this region has a magnitude of 3.0 × 10⁻⁷ T. They have a coil that rotates 90° in 1.2 s. The area inside the coil measures 5000 m².
Estimate the number of loops needed in the coil so that during that 90° turn it produces an average induced emf of about 120 V. Express your answer using two significant figures.

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

Which is the best for showing percentages of different types of cars sold(gas hybrid , electric , other ) in the united states ?

Why is metal often used for cooking pan?