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What is the temperature for an almost completely absorbing dark planet at 1 AU and with a reflectivity of 10.0 %?

 

 

Jupiter's exosphere has a temperature of about 840.0 K. What is the thermal speed of hydrogen (in km/s) in Jupiter's exosphere? The mass of a hydrogen atom is 1.67 x 10-27 kg and Boltzmann's constant is k = 1.38 × 10-23 Joule/Kelvin.

 Sep 17, 2020
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Celsius: -273

Fahrenheit: -459

for #1

 

And second one all I know is the mass of a hydrogen atom is 1.67 x 10-27 kg and Boltzmann's constant is k = 1.38 × 10-23 Joule/Kelvin. But I don't know how to solve! SOrry!!

 Sep 17, 2020

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