HELP NOW PLEASE ANSWER THE QUESTION THE PICTURE IS ATTACHED BELOW

How have the competing explanations' experiments on atoms affected the development of the atomic model?

If steel is more dense that lake water, why can a boat float

Ameter stick is pivoted at the 0.50-m line. a 3.0-kg object is hung from the 0.15-m line. where should a 5.0-kg object be hung to achieve equilibrium (the meter stick oriented horizontal and motionless)?