The mass of a paper-clip is 0.50 g and the density of its material is 8.0g/cm'. The total volume of a number of clips is 20 cm.
How many paper-clips are there?

Erosion of the beach is normally a slow process. however, in certain situations, large chunks of shore may wash out to sea. what could cause this to happen?

The sun’s mass is 2.0×10^ 30 kg, its radius is 7.0×10 5 km, and it has a rotational period of approximately 28 days. if the sun should collapse into a white dwarf of radius 3.5×10 3 km, what would its period be if no mass were ejected and a sphere of uniform density can model the sun both before and after?

What happens to an isotope during radioactive decay?