In the Sun's core, thermonuclear reactions produce the energy which2.eventually produces the Sun's luminosity. The Sun's core has a temperature,Tcore 1.6 x 107 K. The mass density of the core is approximately p= 1.5x 10 kg m3. Assuming the core has the same mass fraction of hydrogenas the Sun's atmosphere (XH = 0.75), approximate the number of fusionreactions between two hydrogen nuclei (two free protons) per second. Youmay assume that the temperature and density are uniform throughout thecore (not realistic!), which extends from the center of the sun out to aboutRo/5, and that particles within the core act like a non-relativistic ideal gas(Maxwellian velocity distribution) with all reactions happening at the samerelative velocity. Also assume the cross-sectional area for a proton-protonreaction is o = 2.75 x 1048 m2.%3D

Given: Tcore≈1.6×107Kρ=1.5×105 kg m-3σ=2.75×10-48 m2 Formula used: The approximate reaction = Total…

Answered: In the Sun's core, thermonuclear…

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