True or False: Radioactivity drives plate-techtonics?

Aluminum–lithium (al-li) alloys have been developed by the aircraft industry to reduce the weight and improve the performance of its aircraft. a commercial aircraft skin material having a density of 2.47 g/cm3 is desired. compute the concentration of li (in wt%) that is required.

Which of these statements explains the difference between nuclear binding energy and the strong nuclear force ?

Δu of , in kj/kg, as it isto k, (a)as a of , (b) at , (c) at .