Are you talking about:
P=4pir^2*s*T^4
Where s is the Stefan Bolzmann constant ??
Because now i don't know what to do with the distance given from th star to the place of the measurement..
Homework Statement
An astronomer is trying to estimate the surface temperature of a star with a radius of 5.0* 10^8m by modeling it as an ideal blackbody. The astronomer has measured the intensity of radiation due to the star at a distance of 2.5* 10^{13}m and found it to be equal to 0.055...
Homework Statement
The x coordinate of an electron is measured with an uncertainty of 0.200 mm. What is v_x, the x component of the electron's velocity, if the minimum percentage uncertainty in a simultaneous measurement of v_x is 1.00 %? Use the following expression for the uncertainty...