Fundamentals Of Construction Estimating
4th Edition
ISBN: 9781337399395
Author: Pratt, David J.
Publisher: Cengage,
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Chapter 4, Problem 8RQ
To determine
To describe: the requirement using grid method for cut and fill volume calculation.
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A 200-lb block is at rest on a 30° inclined plane. The
coefficient of friction between the block and the
inclined plane is 0.20. Compute the value of a
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200 lb
P
30°
Please explain step by step
Problem 1
=
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= 13,600
Manometers can be used in combination with cardiovascular catheters to measure blood
pressure based on height differences. In the example in Figure 1, the manometer
contains two fluids: water (density p 995 Kg/m³) and mercury (density pm
Kg/m³). The density of blood is p 1,060 Kg/m³. Assume that there is atmospheric
pressure at the interface between mercury and air. The interface between mercury and
water is at z₁ = 7 cm, the interface between water and blood is at Z2 27 cm, and the
tip of the manometer at za 10 cm.
Recall that the fluid statics equation is dp/dz-pg 0, when the z axis is taken
pointing downwards.
a. What is the gauge pressure po at the interface with air, in mmHg? (5 points)
b. Calculate the gauge pressure ps at the tip of the manometer, in mmHg. (5
points)
N
Z37
blood
ப
Zz
Water
Mercury
Zo
3=0
z
Figure 1. Manometer for blood pressure measurement.
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Fundamentals Of Construction Estimating
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