Calculating Pressure Increase from Ice Expansion in an Engine Block

AI Thread Summary
When water freezes, it expands by approximately 9.10%, which can significantly increase pressure in an automobile engine block. The bulk modulus of ice is given as 2.00 x 10^9 N/m², leading to a calculated pressure increase of 1.82 x 10^8 Pa using the formula Delta P = -B*(Delta V)/V. The user notes that their answer is within 10% of the expected result but suspects a minor error in their calculations. They express confusion regarding the percentage decrease, indicating a misunderstanding of the relationship between the values. The discussion highlights the complexities of calculating pressure changes due to phase transitions in fluids.
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Homework Statement



When water freezes, it expands about 9.10%. What would be the pressure increase inside your automobile engine block if the water in it froze? The bulk modulus of ice is 2.00 multiplied by 10^9 N/m2.


Homework Equations



Delta P=-B*(Delta V)/V

The Attempt at a Solution



Delta P= 2*10^9*.091
= 1.82*10^8 Pa

It says that the answer is within 10% of the correct answer however I don't know if there is a small error that is causing me to be slightly off.
 
Physics news on Phys.org
1.00 is not 9.10% less than 1.0910. Know what I mean?

EDIT: By the way, welcome to PF!
 

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