Homework Help: TO MS SUE SCIENCE HELP

Posted by SPIKE on Friday, December 14, 2012 at 10:11pm.

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

TO MS SUE SCIENCE HELP - Damon, Friday, December 14, 2012 at 10:24pm
Volume = (27.8 -21.2) cm^3
mass = 22.4 g
density = 22.4/(27.8-21.2) g/cm^3
TO MS SUE SCIENCE HELP - Damon, Friday, December 14, 2012 at 10:25pm
High tensile strength so it can be made lighter for the same strength despite being more dense.
TO MS SUE SCIENCE HELP - SPIKE, Friday, December 14, 2012 at 10:26pm
THANK YOU SO MUCH :):):):):)

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