The half-life of radium-224 is approximately 3.66 days. step 1 of 3 : determine a so that a(t)=a0at describes the amount of radium-224 left after t days, where a0 is the amount at time t=0. round to six decimal places.

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?

Holes drilled several kilometers into earth’s crust provide direct evidence about earth’s interior in the form of

Difference between series and parallel circuits