You are evaluating a solar system in a commercial building. the photovoltaic system has an area of 50 m2 and an efficiency of 22%. the insolation for a given day is shown on the plot below (note that each bar represents one hour of the day) i. what is the amount of electricity generated by the solar system for the day [kwh]? 3 pts ii. if the electricity use peak occurs from 16: 00-18: 00, how much does the system reduce the peak demand [kw]? ii. for peak shaving purposes, you wanted to store 10 kwh of energy using a flywheel. the s2p flywheel has a mass of 200 kg, a radius of 1 m, and ring shape factor (k- 1). with what frequency does the flywheel need to turn 800 700 2 pts 600 500 400 300 드 200 100 0 1 2 3 4 5 6 7 89 101112 1314151617181920212223 hour of day

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

The mini-refrigerator fire was most likely caused by what type of wiring?

Imagine you are standing in the antarctic during the southern hemisphere summer. the sky is clear and blue. there are no clouds in the sky. your shadow is cast on the icy ground. what is the color of the shadow?