1. The dimensions are converted from cm to m: 10 cm ×1 m100 cm=0.1 m 5 cm ×1 m100 cm=0.05 m
The volume of the water in the tank is:
V=0.1×0.1×0.05=0.0005 m3
The mass of the water is:
m=ρV=1000kgm3×0.0005 m3=0.5 kg 2. g=9.81ms2 a. The force F exerted by the water is: F=mg=0.5 kg9.81ms2=4.905kg∙ms2=4.905 N b. The force F is exerted downwards, towards the centre of the Earth. c. The water would want to move downwards because of gravity. d. The height h is converted to meters:5 cm ×1 m100 cm=0.05 m
The potential energy U is:
U=Fh=4.905 N0.05 m=0.2453 N∙m=0.2453 J 3. The volume of the olive oil is assumed to be ...