When the sun is directly overhead, it produces an illuminance of 105,000 lux on a horizontal surface on the earth. It has an angular diameter of 0.53 degrees as seen from the earth, and the distance from the sun to the earth is 150*10^6 km. What is the average luminance of the sun?

19. In the diagram the correctly marked angles are Zi and zr Zr and ze Li and Ze Zi, zrand ze а. b. C. d.

Could I have help with this physics problem

Large telescopes often have small fields of view, i.e. it can only see a very small corner of the sky. For example, the Hubble Space Telescope (HST) Advanced Camera has a field of view that is roughly square and about 0.055 degree on a side. How do I Calculate the angular area of the HST's field of view in square degrees?

spherical polar coordinate ()(중) sin o Cos Ø 3/2 2a %3D 矿ク %3D %3D

What would be the refractive index of a compound at 20 C, if its refractive index was at 22.9 C and 1.4730 ?

If the luminous flux of a lightbulb is 1750 lm, what is the illuminance of a surface 2.0 m from the light source?

Fnorm Fapp Fgrav = %3D m=15.0 kg a = 0.50 m/s/s, right ΣF = %3D

You are on a search and rescue team, trying to reach an injured hiker. You can see the light from a cell phone, and you use your compass to determine that the hiker is at an azimuth of 59 degrees (59 degrees east of north) from you. You use a rangefinder to estimate that the hiker is 800 meters away. You need to know the GPS coordinates of the hiker in order to tell the rescue helicopter where to find the hiker. (Keep at least one decimal place in your answer.) How many meters north of you is the hiker? m. How many meters east of you is the hiker?

Given theta= 31.9 and c=5.0 what is phi? Round to one decimal.