Physics, 15.10.2019 06:30 denareena97
Which of these is the best method to estimate the speed at which a star is moving away from earth?
measure the star's red shift
calculate the pitch due to changes in frequency of light
calculate the parallax due to changes in earth's position
measure the star's blue shift
Answers: 1
Physics, 22.06.2019 06:00
Complete the statement about memory improvement. ( )involves organizing and breaking down information into easier groups to expand capacity. rehearsal is the verbal repetition of information. these techniques are especially important for the improvement of ( ) memory.
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Physics, 22.06.2019 11:10
While standing outdoors one evening, you are exposed to the following four types of electromagnetic radiation: yellow light from a sodium street lamp, radio waves from an am radio station, radio waves from an fm radio station, and microwaves from an antenna of a communications system. rank these type of waves in terms of increasing photon energy.
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Physics, 22.06.2019 17:00
What equation is used to calculate the weight of an object on a plant ?
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Physics, 22.06.2019 20:00
Awave has a wavelength of 7 mm and a frequency of 19 hertz. what is its speed?
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Which of these is the best method to estimate the speed at which a star is moving away from earth? <...
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