Question

1- A piece of metal has a mass of 5.0 kg and a volume of 1000 cm3.

a) Find the density of the metal.
b) Would a 2000 cm3 piece of the same metal have the same density?
c) What would the mass of the 2000 cm3 piece be?

2. Water expands when heated. If a beaker of water is heated from 10 C to 90 C, does the pressure at
the bottom of the beaker increase, decrease, or stay the same? Explain your reasoning.

Answer 1

1)density=mass/volume=5000/1000=5g/cc

yes it will be having same density because it belongs to the same kind of metal

mass=densityXvolume=5x2000=10000g

2)the pressure at the bottom of the glass remains same.

   during this course of heating formation of bubbles takes place.These bubbles are the air that was dissolved in the water at room temperature coming out of solution. Air becomes less soluble in water as the temperature goes up.Hence there wont be any effect on pressure at the bottom