Recent content by Sasa888

  1. S

    Print ViewBlackbody Radiation and Continuous Spectra

    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..
  2. S

    Print ViewSimultaneous Measurements of Position and Velocity

    Ok I am going to try it Thanks a lot!
  3. S

    Print ViewBlackbody Radiation and Continuous Spectra

    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...
  4. S

    Print ViewSimultaneous Measurements of Position and Velocity

    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...