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At $20^{\circ} \mathrm{C}$ , the surface tension …

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Problem 40 Easy Difficulty

What radius must a water drop have for the difference between the inside and outside pressures to be 0.0200 atm? The surface tension of water is 72.8 dynes/cm.

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Video Transcript

okay. And this problem were asked what radius of water droplet must have in order that the excess pressure is equal to 0.2 atmospheres. So first off, we want Teo Express this pressure difference of 0.2 atmospheres in terms of past calls and come the conversion factors that one atmosphere is equal to one point Owen three times 10 to the five past calls. So this expression here will give us the the excess pressure in the units that we want and the formula that relates the excess pressure to the surface Tension and the radius is this equation here. Delta P equals to gamma over our and were given that the surface tension of water gamma is equal to 72.8 dynes per centimeter and one dime per centimeter is equal to 10 to the negative three moons per meter. So all together at the surface tension express them units that we want is given by this If so, Lastly, if we want to find the radius are what we want to do is solve this equation for our we have our equals to gamma over Delta P, which is equal to two Times 78 Excuse me, 72.8 times 10 to the negative three. Divided by Delta P, which is 0.0 too. Times 1.13 times 10 to the five.

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Problem

At $20^{\circ} \mathrm{C}$ , the surface tension …

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Watch More Solved Questions in Chapter 13

Video Transcript

Hugh D. Young

College Physics

Christina Krawiec

Andy Chen

Aspen Fenzl

Meghan Miholics

This textbook answer is only visible when subscribed! Please subscribe to view the answer

College Physics

Christina Krawiec

Andy Chen

Aspen Fenzl

Meghan Miholics

Hugh D. YoungCollege Physics

Christina Krawiec

Andy Chen

Aspen Fenzl

Meghan Miholics

Hugh D. Young

College Physics