1 Give show two very specific quantifiable advantages instea

1. Give (show) two very specific quantifiable advantages instead of water, oil or other liquids. for the use of Mercury for barometers measuring atmospheric pressure, he use of water in manometers used to measure airflow is common, while the use of mercury is commonly used in flows of In the measurement of the pressures used to determine velocity, the two pressures measured easily are in terms of density and velpressure. The difference between these two is dihamicpressure which is d in terms of density and velocity. Thus this pressure allows for calibration of EOAIpressure and Equations such as q-½ V, are dimensionally homogeneous equations which means with this equation. is the definition of dunam pressure, and allows the c integration of V dV along a streamline, as a measure of the kinetic energy in the flow. may be used calculation of velocity. This is a equation which means that any unit system can be used with this equation. The constant y is dimensionless as it was added from the

Solution

[1]

1. Mercury is relatively denser than water. Its relative density is 13.534 times that of water. So, to measure the atmospheric pressure, which is 760 mm of mercury you need a barometer ,with mercury, of length slightly more than 0.76 meter, say one meter to cover the special cases of some higher pressure. If you use water, you have to have the length of barometer of length (or height) 13.534 times the length of mercury barometer, which may be more than 11 meter in length.

2. Mercury has a very low vapor pressure when compared to that of water. So it is more sensitive than water to the changes in the atmospheric pressure and rises more quickly to record the changes in the atmospheric pressure.

3. Mercury\'s freezing point is much lower than that of water\'s so it can record the atmospheric pressure at temperatures below that of 0 degrees centigrade.

4. Mercury does not evaporate easily so very little mercury vapor enters the vacuum above the mercury in the tube.

5. Mercury being a metal shines brightly and so can be used to read the markings on the tube easily.

[2] Blanks

1. Stagnation

2. Static

3. Dynamic

4. Pressure

5. Velocity

6. Same Dimensions (having the same dimensions on its left and right sides)

7. Dynamic

8. Commensurable (Physical quantities that are of the same kind which have the same dimension (length, time, mass) and can be directly compared to each other, even if they are originally expressed in differing units of measure (such as inches and meters, or pounds and newtons))