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Author Question: According to Laplace's law, if the surface tension of a sphere is doubled, what will happen to the ... (Read 69 times)

Pineappleeh

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on: Jul 16, 2018
According to Laplace's law, if the surface tension of a sphere is doubled, what will happen to the pressure within the sphere?
 
  a. The pressure will decrease by one half.
  b. The pressure will increase by one half.
  c. The pressure will quadruple.
  d. The pressure will double.

Question 2

According to the Systme International d'Units, surface tension is measured in:
 
  a. cc3. c. lb/cc3.
  b. lb/in2. d. dyne/cm.


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aprice35067

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Reply #1 on: Jul 16, 2018
Answer to Question 1

ANS: D
Laplace's law, P = 2(ST/r), states that the pressure within a sphere is directly related to the sur-face tension of the liquid and inversely related to the radius of the sphere; that is, both surface tension and pressure within a sphere will change equally in the same proportion.

Answer to Question 2

ANS: D
In the Systme International d'Units system of measurements, surface tension is measured in dyne per centimeter.


Pineappleeh

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Reply 2 on: Jul 16, 2018
Thanks for the timely response, appreciate it

marict

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Reply 3 on: Yesterday
Wow, this really help

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