Aweight is hung from the ceiling of an elevator by a massless string. under which circumstances will the tension in the cord be the least?

During the experiment if you could triple the breakaway magnetic force with all other quantities left unchanged, what is the new value for the critical velocity if it was v0 (initial velocity), initially? (b) now if you halved the radius with all other quantities left unchanged, what is the new critical velocity if it was v0 (initial velocity), initially? (c) if during the experiment, critical velocity quadrupled with all other quantities left unchanged, what is the new breakaway force if its magnitude was initially f0,?

What happens to an isotope during radioactive decay?

What is the technical name for super glue type adhesives?