Read the excerpt from the boy who harnessed the wind by william kamkwamba. the wind would spin the blades of the windmill, rotate the magnets in a dynamo, and create electricity. attach a wire to the dynamo and you could power anything, especially a bulb. all i needed was a windmill, and then i could have lights. no more kerosene lamps that burned our eyes and sent us gasping for breath. with a windmill, i could stay awake at night reading instead of going to bed at seven with the rest of malawi. which fact about malawi the reader understand what the excerpt is mostly about?

First, launch the video below. you will be asked to use your knowledge of physics to predict the outcome of an experiment. then, close the video window and answer the question at right. you can watch the video again at any point. part a as in the video, we apply a charge +q to the half-shell that carries the electroscope. this time, we also apply a charge –q to the other half-shell. when we bring the two halves together, we observe that the electroscope discharges, just as in the video. what does the electroscope needle do when you separate the two half-shells again? view available hint(s) as in the video, we apply a charge + to the half-shell that carries the electroscope. this time, we also apply a charge – to the other half-shell. when we bring the two halves together, we observe that the electroscope discharges, just as in the video. what does the electroscope needle do when you separate the two half-shells again? it deflects more than it did at the end of the video. it deflects the same amount as at end of the video. it does not deflect at all. it deflects less than it did at the end of the video. submit

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