1)
p-p chain and CNO cycle are similar in a way that both convert four hydrogen nuclei into one helium nucleus. However, CNO cycle needs carbon to be present therefore, CNO cycle needs higher temperature.
The proton-proton chain reaction is found in stars having size of the Sun or smaller and CNO cycle comes when the size is much bigger than the sun.
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2)
the physical reason is that more massive and bigger main sequence stars are hotter and more luminous than the low-mass main sequence stars. More bigger size means they shed their energy faster
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3)
larger the mass, shorter the life because with larger size comes large requirement to burn core hydrogen so star will run out of hydrogen earlier
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4)
equation to find life span
T = 1010 ( mass of sun / mass of star in solar masses) 2.5
so,
for M = 25 solar masses
T = 3.2 million years
and
for M = 5 solar masses
T = 178.9 million years
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please help me solve these PHYS 122 Explain or justify all answers Astronomy: Stars & Galaxies...
#2 please ! Ro le Astronomy 1F03 Problem Set 3 Thursday, Nov 10th, 2019 Write your answers on a separate sheet and show your work 1. The protesproton chain effectively c erta hyre en into hem according to 4 He. A Helium wus weighs 6.64518 x 10 IT kg and Hydrogen mucha proton) welches 1.67262 x 10 Workout the change in a when I kg of Hydrogen is converted completely into Helium 4. Convert the change in mass Per burning...