What do scientist need to look at before developing

According to social exchange theory, altruistic behaviors benefit the individual who performs them. t/f

How does the amount of energy required to hold each proton and neutron in the nucleus compare to the energy released when they are removed?

Rank the automobiles based on the magnitude of the force needed to stop them, from largest to smallest.2000 kg car going 5m/s500 kg car going 20 m/s1000 kg car going20m/s500 kg car going10m/s1000 kg car going10/s4000 kg car going 5m/s 0 0 603