If you wanted to measure the width of the gym, how would the accuracy of a meter stick compare with that of a 50m tape

Will you chech and finish these for me, because i am stumped with them.

What is the power rating of the lightbulb if 3.0 a flow through it when connected to a 15 v battery

Arigid tank is divided into two equal parts by a partition. one part of the tank contains 3 kg of compressed liquid water at 400 kpa and 60°c while the other part is evacuated. the partition is now removed, and the water expands to fill the entire tank. determine the entropy change of water during this process, if the final pressure in the tank is 40 kpa. use steam tables.