Do a stretched spring and a box on a high shelf both have potential energy why or why not explain you answer?

The correct answer to this question is "Yes." A stretched spring and a box on a high shelf both have potential energy. Potential energy is energy reserved to do work. Potential energy stored as a result of deformation of an elastic object, such as the stretching of a spring. It is equal to the work done to stretch the spring, which depends upon the spring constant k as well as the distance stretched.

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.

Ray 2 should cross through the focal point on the right side of the lens