A spring is stretched 0.65 meters. If its spring force constant is 238.9 Newtons/meter, how much elastic potential energy does it have?

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.

It is the areas with lines. this may sound a little confusing, but i hope it !

  the answer is don't know.