Answer:
21 hours
Explanation:
well 30 x 20 = 600 than 21 = 630
Answer:
The H-R diagram can be used by scientists to roughly measure how far away a star cluster or galaxy is from Earth. This can be done by comparing the apparent magnitudes of the stars in the cluster to the absolute magnitudes of stars with known distances (or of model stars).
Answer:
You could conclude the 2nd fact
Explanation:
The negative charges of the balloon will stick to the positive charges on the wall.
