How much force does it take to give a 70 kg object an acceleration of 20 mls2

The junction rule describes the conservation of which quantity? note that this rule applies only to circuits that are in a steady state.

Acircular ring of charge with radius b has total charge q uniformly distributed around it. what is the magnitude of the electric field at the center of the ring? 0 keq/b2 keq2/b2 keq2/b none of these answers

Which stable element is used to determine the age of volcanic rock? a- argon b- carbon-14 c- potassium d- carbon-12