Question

6.
The sun's angular diameter is measured to be 1920". The distance D of the sun from the earth
is 1.496 * 1011 m. Find the diameter of the sun.
(Hint: d = aD]
7.The moon is observed from two diametrically extremes A and B on earth. The angle of parallax
is found to be 1° 54'. If the diameter of the earth is about 1.276 x 10 m, estimate the distance
of the moon from the earth.​

Answer 1

Answer:

Explanation:Well now I have to look up what the double quote means. Probably minutes or seconds.

OK, Wikipedia says For example, 40.1875° = 40° 11' 15" .

That's 40 degrees, 11 minutes, 15 seconds, a minute being 1/60th of a degree and a second being 1/60th of a minute. (Thank you Babylonians.)

So we're to understand 1920" as

1920

3600

degrees

=

1920

3600

⋅

2

π

360

radians

So we're looking at a diameter

d

=

1.496

×

10

11

⋅

1920

3600

⋅

2

π

360

meters

d

=

1.39254

×

10

9

meters