Vega is the fifth brightest star in the night sky. This bluish dwarf star has a radius of 0.810 x 109 m. If the surface temperature is 9.71 *103 K, what is the rate at which energy is radiated from the star? Assume that the spherical surface behaves as a blackbody radiator. [Surface Area of a sphere = 4πr24πr2 ; Area of a circle = πr2πr2 or πd24πd24 ;σ=5.67⋅10−8Jsm2K4σ=5.67⋅10-8Jsm2K4 ]
Energy transfer
The flow of energy from one region to another region is referred to as energy transfer. Since energy is quantitative; it must be transferred to a body or a material to work or to heat the system.
Molar Specific Heat
Heat capacity is the amount of heat energy absorbed or released by a chemical substance per the change in temperature of that substance. The change in heat is also called enthalpy. The SI unit of heat capacity is Joules per Kelvin, which is (J K-1)
Thermal Properties of Matter
Thermal energy is described as one of the form of heat energy which flows from one body of higher temperature to the other with the lower temperature when these two bodies are placed in contact to each other. Heat is described as the form of energy which is transferred between the two systems or in between the systems and their surrounding by the virtue of difference in temperature. Calorimetry is that branch of science which helps in measuring the changes which are taking place in the heat energy of a given body.
Vega is the fifth brightest star in the night sky.
This bluish dwarf star has a radius of 0.810 x 109 m. If the surface temperature is 9.71 *103 K, what is the rate at which energy is
Assume that the spherical surface behaves as a blackbody radiator.
[Surface Area of a sphere = 4πr24πr2 ; Area of a circle = πr2πr2 or πd24πd24 ;σ=5.67⋅10−8Jsm2K4σ=5.67⋅10-8Jsm2K4 ]
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