A star has a mass of 18 1030 kg and radiates energy at the
A star has a mass of 1.8 1030 kg and radiates energy at the rate of4.0 1026 W. What fraction of its original mass has the star lost inthis way since it began to burn hydrogen, about 4.2 109 y ago?
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a very large tank contains the gas ethane the pressure of ethaneis 214 x 104 pa thereare 428 moles of this gas in
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given a stationary phase of silica gel and nonpolar and polar analyte which would elute first also if given a polar
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a star has a mass of 18 1030 kg and radiates energy at the rate of40 1026 w what fraction of its original mass has the
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a tube is closed at one end and open to 16 o c air atthe other end the tube vibrates in the fifth harmonic at
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