Question

Relative to the stars, through how many arc seconds does the Moon move in 14 s?

Answer 1

Answer:

Moon move in 14 s = 7 arc second.

Explanation:

we know that moon mover 0.5 degree in 1 hour

In 1 hour the Moon move 0.5 degrees = 1800 arc second.

So, in 1 sec the Moon move$s =\frac{1800}{3600} = 0.5\ arc\ second.$

therefore in 14 second the Moon moves

$= (0.5\times 14)$

 In 14 second = 7 arc second.