Which is not an advantage that a reflector telescope has over a refractor telescope? A. Flaws and bubbles in the material inside a thick mirror are not a problem, while flaws and bubbles in the material inside a thick lens are. B. Reflectors can be built with much bigger apertures. C. The device that collects the light is more easily supported in a reflector. D. Reflectors avoid the problem of chromatic aberration in the lens. E. A reflector doesn’t have to deal with the twinkling of the stars, as a refractor does.

The process in which the nucleus of an atom splits into two lighter atoms, releasing a large amount of energy is nuclear

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

Who was the first scientist to measure speed as distance over time?