A 120 kg skydiver jumped out of a plane 3500m in the air. Determine the Gravitational potential energy of the skydiver.

Answerthe valence of an element or radical is equal to the number of positive or negative charges on the ion.

Year  1936,  lehman predicted that the earths 'inner core' is solid. she observed that the seismic signals during her study were bent and did not pass through instead bouncing back. later it was confirmed that the earth's inner core was solid made up of nickel-iron and had a molten outer core.