Explain the difference between cosmic rays and electromagnetic radiation, and how cosmic particles are captured
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Unlike electromagnetic radiation, which is made up of photons, cosmic rays are subatomic particles such as electrons and protons traveling at nearly the speed of light, arriving from mostly unknown cosmic sources.
Almost no cosmic rays reach the ground, but some of them smash into gas atoms in Earth's upper atmosphere, and fragments of those atoms shower down to the ground. Huge detectors must be built to catch and count them. For example, detectors for some kinds of cosmic rays have been carried on balloons or launched into orbit, while others have been built deep underground where layers of rock filter out all but the most penetrating particles.
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A) top left. B) top right. C) middle of the main sequence. D) top center. E) bottom left.
Electrons flow in an electrical circuit by
A) being bumped by other electrons. B) colliding with molecules. C) interacting with an established electric field. D) none of the above
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A) Moles angle. B) refracted angle. C) Brewster angle. D) Land angle.
You carry a 20 N box 5 m horizontally across a room. The work you do is
a. 0 c. 100 J b. 4 J d. none of the above