Why healthy is called the wealth ?

Asun-sized star will spend most of its lifetime as a: white dwarf red giant protostar main-sequence star

The average density of the planet uranus is 1.27 103 kg/m3. the ratio of the mass of neptune to that of uranus is 1.19. the ratio of the radius of neptune to that of uranus is 0.969. find the average density of neptune.

Avoltaic cell converts chemical energy to