A meat baster consists of a squeeze bulb attached to a plastic tube. When the bu

Question

A meat baster consists of a squeeze bulb attached to a plastic tube. When the bulb is squeezed and released, with the open end of the tube under the surface of the basting sauce, the sauce rises in the tube to a distance h, as the drawing shows. Using 1.013

A meat baster consists of a squeeze bulb attached to a plastic tube. When the bulb is squeezed and released, with the open end of the tube under the surface of the basting sauce, the sauce rises in the tube to a distance h, as the drawing shows. Using 1.013 A?? 10^5 Pa for the atmospheric pressure and 1210 kg/m^3 for the density of the sauce, find the absolute pressure PB in the bulb when the distance h is (a) 0.19 m and (b) 0.09 m.

Explanation / Answer

a)

h =0.19 m

P = h*p*g = 0.19*1210*9.8 = 2253.02 Pa

total pressure in the bulb = Po + P = 1.013*10^5 - 2253.02 = 9.9047*10^4 Pa

b)

h= 0.09 m

P = h*p*g = 0.09*1210*9.8 = 1067.22 Pa

total pressure in the bulb = Po + P = 1.013*10^5 - 1067.22 = 1.00233*10^5 Pa

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