Second Law Of Motion Apparatus, 25 Cm Long Unit Has A 10 mm Rod. It May Be Horizontally Clamped To A Support Stand Or Table Clamp. Complete With Two Steel Balls, Substantial Metal Casting And The Entire Mechanism Is Visible, The Spring Gun Offers Two Tensions
Needle source Pb-210 contains 0.01 microcuries of Lead-210 in equilibrium with its daughters Bi-210 and Po-210, produces a source of both alpha and beta particles