Amass weighing 20 pounds stretches a spring 6 inches. the mass is initially released from rest from a point 9 inches below the equilibrium position. (a) find the position x of the mass at the times t = π/12, π/8, π/6, π/4, and 9π/32 s. (use g = 32 ft/s2 for the acceleration due to gravity.)]

If there was no gravity then their would be no downword force on the football to have it return the the grownd, and if there was no friction (mainly air friction) then there would be no opposing force the stop the ball from moving through the air allowing the ball to travle ∞.

Molybdeum(mo)orruthenium (ru)actually, elements with similar chemical properties as technetium would bemn, re, and bh. this is because elements in the same group/family (column) have similar chemical properties. elements in the same period (row) have the same number of energy levels (or shells).