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3 years ago

Look at the spectrums of a star moving towards Earth and a motionless star.

Chemistry

2 answers:

Kay [80]3 years ago

8 0

The answer is; The spectrum of a star shifts towards the blue region when the star moves towards Earth.

This is referred to as the Doppler shift effect. As the star moves closer to the observer, the wavelength of light it produces is ‘compressed’ hence changing its relative frequency (just like the pitch of the siren of an ambulance approaching you).

AfilCa [17]3 years ago

6 0

it is Blue shifted when moving towards Earth

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Jack an investigator wants to prove that a certain suspect was present at the crime scene when the crime was committed. What kin

grin007 [14]

Answer:

eye witnesses, dna, fingerprints, hair, time stamped photos/ videos

Explanation:

5 0

3 years ago

Each astronaut produces 8.8 x 10^2 grams of CO2 per day that must be removed from the air on the shuttle if typical shuttle miss

iris [78.8K]

M₀(CO₂)=8.8*10² g
m(LiOH)=3.5*10⁴ g
x=9 d

2LiOH + CO₂ = Li₂CO₃ + H₂O

m(CO₂)=M(CO₂)m(LiOH)/2M(LiOH)

N=m(CO₂)/xm₀(CO₂)=M(CO₂)m(LiOH)/{2M(LiOH)xm₀(CO₂)}

N=44.01*3.5*10⁴/{2*23.95*9*8.8*10²}=4

The maximum number of people is 4.

It is also possible the reaction:
Li₂CO₃ + CO₂ + H₂O = 2LiHCO₃

5 0

3 years ago

Read 2 more answers

An isotope will lose nucleons, protons, or neutrons in order to become more

Ne4ueva [31]

An isotope will lose neutrons in order to become more stable.

3 0

3 years ago

Background Info:

Sindrei [870]

You will get at first carbon dioxide by burning C:
$C+O_2=CO_2$
Burn hydrogen to obtain water:
$H_2+\frac{1}{2}O_2=H_2O$
Combine them:
$CO_2+H_2O=H_2CO_3$
Now react it with Ba:
$Ba+H_2CO_3=BaCO_3+H_2$
To sum up, the reaction is $Ba+C+\frac{3}{2}O_2=BaCO_3$ , using hydrogen as a catalyst.

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3 years ago

Read 2 more answers

The correct IUPAC name for the following molecule is: _________

andrew-mc [135]

Answer:

A.) trans-2,3-dichloro-5-methyl-2-hexene

Explanation:

The proposed question and structure has been attached to this answer.

The cis- and trans- isomers are used to denote the alignment of the functional groups to the carbon chain side. From the diagram, we see that:

the two chloro groups on the main compound are in opposite directions (-trans), and not the same sides (-cis)
The bottom extended methyl group is on the 5th carbon as we count from left to right
there's a total of 6 carbon atoms with 1 double bond on the second to third carbon.

Hence the name trans-2,3-dichloro-5-methyl-2-hexene

8 0

2 years ago