When the Sun becomes a white dwarf with a surface temperature similar to its current surface temperature, what will its luminosity be?
What will be an ideal response?
Approximately 10-4 LSun
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When a fixed amount of ideal gas goes through an adiabatic expansion,
A) its internal (thermal) energy does not change. B) the gas does no work. C) no heat enters or leaves the gas. D) its temperature cannot change. E) its pressure must increase.
The equator of Jupiter rotates slower than the Great Red spot
Indicate whether the statement is true or false
A lepton interacts via the strong interaction
Indicate whether the statement is true or false
A 1500 W portable heater is needed to replace the heat lost through a circular window (radius 25 cm) in the wall of a home that is made of a single pane of glass 0.30 cm thick. Thermal conductivity for the glass is 0.63 W/mK. The temperature inside the house is 
and outside is 
What is the thickness of the window?
A. 0.84 mm B. 4.2 mm C. 2.6 mm D. 0.66 mm