A 0.75 kg toy car moving with a speed of 3 m/s to the right collides with a 0.25 kg toy car moving with a speed of 3 m/s to the left. The two collide and the 0.25 kg toy car ends with a speed of 5 m/s to the right. What is the final speed of the 0.75 kg car? Is this collision elastic? Explain.β
Answers: 3
Physics, 21.06.2019 16:20
A1,200 kg car is accelerated at 3.7 m/s2. what force was needed to produce this acceleration? a. 4,440 n b. 324.3 n c. 4,388 n d. 304.3 n
Answers: 2
Physics, 21.06.2019 22:30
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? 4Γ’Β·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 2Δβ¬. we are used to viewing graphs from-Δβ¬ to Δβ¬. 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
Answers: 2
Physics, 22.06.2019 05:30
Suppose you have three polarizing filters, with the second at an angle of 42β to the first and the third at an angle of 90β to the first. by what perfect will the original intensity of unpolarized light be reduced to after passing through all three filters?
Answers: 2
Physics, 22.06.2019 11:30
Write down two additional questions about earth's magnetic field that will make your presentation more informative.
Answers: 1
A 0.75 kg toy car moving with a speed of 3 m/s to the right collides with a 0.25 kg toy car moving w...
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