Calculate the average power produced when a car of mass 400 kg accelerates from rest to a speed of 20m/s in a time interval of 1 minute.

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?

Which form of cell division creates the sperm and egg, resulting in half of the chromosomes as the other cells?

The three classes of rocks are sedimentary, metamorphic, and igneous. how are rocks classified into one of these three groups?