TO MS SUE SCIENCE HELP

These are my last 2 questions i need help on....

1. to determine the density of an irregularly shaped object, a student immersed the object in 21.2 ml of water in a graduated cylinder, causing the level of the water to rise to 27.8 ml. If the object had a mass of 22.4 g, what was the density of the object?
(remember 1 ml = 1 cm cubed)

2. Carbon fibre bicycles have essentially replaced the aluminum and aluminum alloy bikes in the Tour de France. Carbon fibre has a density of 6.24g/cm cubed. Aluminum has a density of 2.70g/cm cubed. what property of carbon fibre is the most likely reason for the switch? explain your reasoning.

someone help me.... thank you

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asked by SPIKE
  1. Volume = (27.8 -21.2) cm^3
    mass = 22.4 g
    density = 22.4/(27.8-21.2) g/cm^3

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    posted by Damon
  2. High tensile strength so it can be made lighter for the same strength despite being more dense.

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    posted by Damon
  3. THANK YOU SO MUCH :):):):):)

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    posted by SPIKE

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