Homework Help: Physics

Posted by jenn on Tuesday, January 19, 2010 at 4:11pm.

At 30.0 m below the surface of the sea (density = 1025 kg/m3), where the temperature is 5.00°C, a diver exhales an air bubble having a volume of 0.80 cm3. If the surface temperature of the sea is 20.0°C, what is the volume of the bubble just before it breaks the surface?

Physics - bobpursley, Tuesday, January 19, 2010 at 4:17pm
Use the combined gas law:

P1*V1/T1= P2*V2/T2 temps in Kelvins.

Pressure 30 m down can be figured this way.

Pressure= weight water above it+ atmospheric
= density*height + atmospheric pressure
Physics - bobpursley, Tuesday, January 19, 2010 at 4:20pm
oh yes, multiply the density by the gravational field constant to convert kg to N.

Pressure= density*g*height + atmospheric
Physics - tasmen, Sunday, April 15, 2012 at 9:15am
A point source of light is 12 cm below the surface of a large body of water (n=4/3).
What is the radius of the largest circle on the water surface through which the light
can emerge?

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