Physics, 16.03.2020 18:49 maggie123456751
We observe a glowing cloud of gas in space with a spectroscope. We note that many of the familiar lines of hydrogen that we know on Earth seem to be in a different place. They are shifted toward the blue or violet end of the spectrum compared to their positions in the spectrum of glowing hydrogen gas on Earth. From this we can conclude that:
A. the cloud is much hotter than hydrogen on Earth
B. the cloud is moving away from us
C . the cloud is moving toward us
D. the cloud is much cooler than hydrogen on Earth
Answers: 2
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If the speed of a particle triples ,by what factor does its kinetic energy increase?
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1. a camcorder has a power rating of 19 watts. if the output voltage from its battery is 7 volts, what current does it use?answer units 2. a 1.5m wire carries a 6 a current when a potential difference of 57 v is applied. what is the resistance of the wire? yourunits 3. a clothes dryer uses about 2 amps of current from a 240 volt line. how much power does it use? yourunits 4.
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Which of the following are used in an electrochemical cell? a. electrodes b. electrolyte c. terminals d. all of the above
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We observe a glowing cloud of gas in space with a spectroscope. We note that many of the familiar li...
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