Answer to Question #58119 in Molecular Physics | Thermodynamics for Christbeauty

Question

15 In which of the following phenomena is surface tension important?
the floating of a boat in water
the floating of a steel wire in water
the floating of a ballon in air
the floating of a plastic sphere in water

16 Which of the following substances has the highest viscosity at room temperature?
Water
kerosine
palm oil
alcohol

17 An engine absorbs 2000J of heat from a hot reservoir and expels 750J to a cold reservoir during each operating cycle. What is the efficiency of the engine?
50%
62.5%
74.2%
85.6%