About Hannah Wangui
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Entries by Hannah Wangui
How can solar flares affect Earth?
October 16, 2019 in Questions Uploads /by Hannah WanguiQuestion How can solar flares affect Earth? a. They are created by reconnection events when two arches on the Sun’s surface cancel each other, so they do not affect Earth significantly. b. They emit large amount of X-rays and ultraviolet radiation that travel to Earth and increase the ionization of Earth’s upper atmosphere. Flares also […]
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Why does the Doppler effect detect only radial velocity?
October 16, 2019 in Questions Uploads /by Hannah WanguiQuestion Why does the Doppler effect detect only radial velocity? a. Only objects moving directly toward or away from the observer can emit waves that can be detected. b. For objects moving perpendicular to the line of sight, the wavelength shift can be measured only with a great error. c. In space all bodies either […]
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Explain why ionized calcium can form absorption lines, but ionized hydrogen cannot.
October 16, 2019 in Questions Uploads /by Hannah WanguiQuestion Explain why ionized calcium can form absorption lines, but ionized hydrogen cannot. a. Neutral calcium contains more than one neutron; neutral hydrogen contains only one. There are no electrons in ionized hydrogen and absorption probability is very low. b. Neutral calcium contains more than one proton; neutral hydrogen contains only one. Hydrogen cannot be […]
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