Question

A car drives from east to west over a bridge supported at either end by two pillars. The bridge and car weight is 80 tons. One pillar is pushing up with a force of 30 N. What force is applied to the bridge at the other pillar?

Answer 1

An isotope of an element has:

A.) more protonsB.) less protonsC.) a different atomic mass
D.) he same number of neutrons