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A giant star has a radius of 200 Rsun, with core mass 0.6 Msun surrounded by an extended envelope of mass 0.2 Msun.
a.) Estimate the gravitational potential energy of the envelope.
b.) By applying Virial Theorem to the envelope, determine the thermal energy U of the gas in the envelope, and hence estimate the total energy of the envelope.
c.) Suppose that the envelope is composed entirely of ionized hydrogen. How much energy would be liberated if the gas cooled and all the protons and electrons recombined to form neutral hydrogen (the recombination of energy is 13.6 eV per atom)?
As a 1.00 cm diameter plunger reduces the height of the column of air inside the chamber from 7.00cm down to 0.50cm, the temperature inside increases from 20C to 210C. Determine the air pressure inside the chamber (in atm) after compression if the..
Your car horn happens to have the unusual property of emitting a pure tone at a frequency of 640. Hz. What is the frequency of the echo
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A 1300- {rm N} crate slides 15- {rm m} down a ramp that makes an angle of 35^circ with the horizontal. If the crate slides at the constant speed, how much thermal energy is created.
a 15.0 tank contains 0.209 of helium at 23.0. the molar mass of helium is 4.00 .how many moles of helium are in the
The mass of Venus is 80% that of Earth while its radius is 95% that of Earth. What is the value of the acceleration due to gravity on Venus
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Suppose a charge of -1.60 µC is at the origin and a charge of 3.30 µC is at the point (0, 3.00) m. Find the electric potential at (4.00, 0) m, assuming the electric potential is zero at infinity. V = 3 . V What is electric potential?
a woman of mass m stands at the edge of a solid cylindrical platform of mass m and radius r. at t 0 the platform is
What is the rms current in an RL circuit when a 60.0Hz 240V rms ac voltage is applied, where R = 1.80k? , and L = 420mH?, What is the phase angle between voltage and current
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