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Olegator [25]
3 years ago
7

Explain the Doppler effect using light. Why is the Doppler effect important in astronomy?

Chemistry
2 answers:
Alexeev081 [22]3 years ago
8 0
Doppler effect is the compression or extension of a sound wave, which causes a change in its wavelength / frequency (and so its sound).
Explanation: It is defined as the effect produced by a moving source of waves in which there is an upward shift in frequency for observers, the source is moving towards and downward shift of frequency from which the source is moving away. used to tell if an object in space is moving toward or away from us.
USPshnik [31]3 years ago
6 0

Answer:

When a star is moving away the light looks red or redder. And when a star is moving toward you it is blue or bluer. This is important because you can tell which way the star is moving.

Explanation:

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An air sample contains 0.044% CO2? If the total pressure is 750 mm Hg. What is the partial pressure of CO2?2?
Aleksandr [31]
Partial pressure=mole fraction×Pt
x=0.044÷44(maolarmass of CO2)×Pt
x=0.044÷(44)2×Pt
x=5×10^-4×Pt
x=5×10^-4×Pt
where Pt:1atm=760mmHg
xatm=750mmHg
750×1÷760=0.99
now;5×10^-4×099=4.95×10^-4.
Pt=4.95×10^-4
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3 years ago
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mariarad [96]
I think the correct answer is b. Temperature is proportional to the average kinetic energy so when temperarure rises so will the average kinetic energy. I hope this helps. Let me know if anything is unclear.
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How many moles of O2 are needed to react completely with 35.0 mol C2h2
Wittaler [7]

Hey There!:


2 C2H2 + 5 O2 = 4 CO2 + 2 H2O


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moles O2 = 35.0 * 5 / 2


moles O2 = 87.5 moles


hope this helps!

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