A drinking straw is placed in a glass of water. A student places their finger over the top opening of the straw and lifts the straw vertically a distance d with the water in the straw staying in the straw. Refer to the figure. Point B is at the surface of the water in the straw and point A is at the surface of the water in the glass. a) Enter an expression for the difference in pressure ΔP = PB - PA between points B and A of the water, in terms of d, the density of the water, ρ, and the acceleration due to gravity, g. b)Calculate that pressure difference, in pascals, for d = 15 mm and ρ = 1.00×103 kg/m3. c)The straw is cylindrical with a radius of 2.5 mm. What is the weight of the water in the straw, in newtons?
A drinking straw is placed in a glass of water. A student places their finger over the top opening of the straw and lifts the straw vertically a distance d with the water in the straw staying in the straw. Refer to the figure. Point B is at the surface of the water in the straw and point A is at the surface of the water in the glass. a) Enter an expression for the difference in pressure ΔP = PB - PA between points B and A of the water, in terms of d, the density of the water, ρ, and the acceleration due to gravity, g. b)Calculate that pressure difference, in pascals, for d = 15 mm and ρ = 1.00×103 kg/m3. c)The straw is cylindrical with a radius of 2.5 mm. What is the weight of the water in the straw, in newtons?
College Physics
11th Edition
ISBN:9781305952300
Author:Raymond A. Serway, Chris Vuille
Publisher:Raymond A. Serway, Chris Vuille
Chapter1: Units, Trigonometry. And Vectors
Section: Chapter Questions
Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...
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A drinking straw is placed in a glass of water. A student places their finger over the top opening of the straw and lifts the straw vertically a distance d with the water in the straw staying in the straw. Refer to the figure. Point B is at the surface of the water in the straw and point A is at the surface of the water in the glass.
a) Enter an expression for the difference in pressure ΔP = PB - PA between points B and A of the water, in terms of d, the density of the water, ρ, and the acceleration due to gravity, g.
b)Calculate that pressure difference, in pascals, for d = 15 mm and ρ = 1.00×103 kg/m3.
c)The straw is cylindrical with a radius of 2.5 mm. What is the weight of the water in the straw, in newtons?
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