Edwin hubble calculated the expansion rate of the universe. on what evidence did he base his calculation?
\l "\l " a. levels of background radiation
\l "\l " b. differences in redshift for galaxies
\l "\l " c. the existence of planets outside of our solar system
\l "\l " d. levels of helium in the universe

On a hot saturday morning while people are working inside, the air conditioner keeps the temperature inside the building at 22degreesc. at noon the air conditioner is turned off, and the people go home. the temperature outside is a constant 33degreesc for the rest of the afternoon. if the time constant for the building is 4 hr, what will be the temperature inside the building at 4 : 00 font size decreased by 2 upper p . font size decreased by 2 upper m .? at 6 : 00 font size decreased by 2 upper p . font size decreased by 2 upper m .? when will the temperature inside the building reach 24degreesc? 324281