Sailin steve likes to test the buoyancy of different objects. he threw a spherical object into a fluid that has a greater density than the object does. he also threw a square object into the fluid that has a greater density than the fluid. predict which object will float best.

Spherical object floats because the fluid density is larger than the object density. The square object could be made ti float if it was shaped like a boat but if it was just a square lamina it would sink.

radioactive decay occurs in unstable atomic nuclei – that is, ones that don't have enough binding energy to hold

the nucleus together due to an excess of either protons or neutrons.