An astronomer notices that the apparent location of Ursa Major (the Big Dipper) in the sky changes between 9PM and 1AM. Which of the following reasons best explains why (s)he notices this?

A> The apparent change in location is due to the Earth revolving around the Sun.
B> The apparent change in location is due to Earth’s rotation on its axis.
C> The apparent change in location is due to the Earth’s magnetic field.
D> The apparent change in location is due to the movement of the stars in outer space.
E> None of the above

hey , the answer is c

wavelegth as in spectrum red oygbiv

the order for strong to weak forces such as

strong nuclear force → electromegnetic force → weak nuclear force → gravitational force

the fundamental forces are those forces that act between to objects or element to make interactions. there are four types of fundamental forces such as strong and weak nuclear forces (due to protons and electrons), electromagnetic force (due to the motion of electrons) and gravitational force (due to orbital movement of the planet). if these forces are arranged on the basis of their maximum strength then the order is

strong nuclear force → electromegnetic force → weak nuclear force → gravitational force

the answer is 12 as i may remember

: )