25th November 2019

quora

16

What is the difference between manometer and Piezometer?

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Simple manometer (piezometer) is consisted of only one liquid. It never gives the negative pressure reading. But in differential manometer, two (or three) liquids are used; and pressure difference of two difffferent liquids can be measured conveniently. Also, it is advanced from any other manometer for its feasibility.

Moreover, how is a barometer different from an anemometer?

Wind speed can also be determined by measuring air pressure. (Air pressure itself is measured by an instrument called a barometer.) A tube anemometer uses air pressure to determine the wind pressure, or speed. A tube anemometer measures the air pressure inside a glass tube that is closed at one end.

How a manometer is used to measure pressure?

The resulting pressure is the difference between forces exerted per unit of surface area of the liquid columns, with pounds per square inch (psi) or newtons per square meter (pascals) as the units. The manometer is so often used to measure pressure that the difference in column heights is also a common unit.

What is a manometer and how does it work?

Instruments employing this principle are called manometers. The simplest form is the basic and well-known U-tube manometer. (Fig. 2-1). This device indicates the difference between two pressures (differential pressure), or between a single pressure and atmosphere (gage pressure), when one side is open to atmosphere.

1

What is the use of differential manometer?

A differential manometer is a device that measures the difference in pressure between two places. Differential manometers can range from devices simple enough to be built at home to complex digital equipment.

2

What is a simple manometer?

A simple manometer consists of a glass tube having one of its ends connected to a point where pressure is to be measured and other end remains open to atmosphere. Common types of simple manometers are: (1) Piezometer. (2) U-tube Manometers.

3

Why do we use mercury in manometer?

Mercury is commonly used in barometers because its high density means the height of the column can be a reasonable size to measure atmospheric pressure. A barometer using water, for instance, would need to be 13.6 times taller than a mercury barometer to obtain the same pressure difference.

4

What is a micro manometer?

Noun. micromanometer (plural micromanometers) (physics) A sensitive manometer that can measure very small differences in pressure.

5

What is single column manometer?

Single column manometer is a modified form of a U-tube manometer in which one side is a large reservoir and the other side is a small tube, open to the atmosphere. There are two types of single column manometer: 1- Vertical single column manometer. 2- Inclined single column manometer.

6

What is inverted U tube manometer?

Inverted U-tube manometer is used for measuring pressure differences in liquids. The space above the liquid in the manometer is filled with air which can be admitted or expelled through the tap on the top, in order to adjust the level of the liquid in the manometer.

7

What is a manometer and what is it used for?

Many techniques have been developed for the measurement of pressure and vacuum. Instruments used to measure and display pressure in an integral unit are called pressure gauges or vacuum gauges. A manometer is a good example as it uses a column of liquid to both measure and indicate pressure.

8

Why Mercury does not stick to the glass?

When liquid water is confined in a tube, its surface (meniscus) has a concave shape because water wets the surface and creeps up the side. Mercury does not wet glass - the cohesive forces within the drops are stronger than the adhesive forces between the drops and glass.

9

Is mercury wet?

Mercury is a liquid, therefore it is a “wet substance”. Heat up Mercury and it becomes a poisonous gas, just as any liquid does evaporate in heat. So yes, while someone might “claim” it is not water wet, (quite correct) it is a liquid & has all properties of “liquid substances” therefore it is wet.

10

Why Mercury does not wet the glass surface?

When liquid water is confined in a tube, its surface (meniscus) has a concave shape because water wets the surface and creeps up the side. Mercury does not wet glass - the cohesive forces within the drops are stronger than the adhesive forces between the drops and glass.

11

Which property of water is responsible for the meniscus?

Why a meniscus occurs. Adhesion is responsible for a meniscus and this has to do in part with water's fairly high surface tension. Water molecules are attracted to the molecules in the wall of the glass beaker.

12

What is convex meniscus?

The meniscus (plural: menisci, from the Greek for "crescent") is the curve in the upper surface of a liquid close to the surface of the container or another object, caused by surface tension. It can be either concave or convex, depending on the liquid and the surface.

13

Why do we read lower meniscus?

This is the downward or upward curve at the surface of a liquid in a container. Depending on how the molecules of the liquid interact, this curve may either be concave or convex. A meniscus occurs because of surface tension in the liquid and must be read at eye level.

14

How is a torn meniscus?

The meniscus is a piece of cartilage that provides a cushion between your femur (thighbone) and tibia (shinbone). There are two menisci in each knee joint. They can be damaged or torn during activities that put pressure on or rotate the knee joint.

15

Can you walk around with a torn meniscus?

A torn meniscus usually produces well-localized pain in the knee. The pain often is worse during twisting or squatting motions. Unless the torn meniscus has locked the knee, many people with a torn meniscus can walk, stand, sit, and sleep without pain.

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How do you tell if you have a torn meniscus?

If you've torn your meniscus, you might have the following signs and symptoms in your knee:

A popping sensation.
Swelling or stiffness.
Pain, especially when twisting or rotating your knee.
Difficulty straightening your knee fully.
Feeling as though your knee is locked in place when you try to move it.

17

What are the two treatments for a meniscus tear?

One study found that arthroscopic pullout repair of a medial meniscus root tear provided better results than partial meniscectomy. Partial meniscectomy is the treatment of choice for tears in the avascular portion of the meniscus or complex tears that are not amenable to repair.

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Are meniscus tears painful?

Like a lot of knee injuries, a meniscus tear can be painful and debilitating. Unfortunately, it's quite common. In fact, a meniscal tear is one of the most frequently occurring cartilage injuries of the knee. Meniscus tears are a special risk for older athletes since the meniscus weakens with age.

19

What is a weather balloon and how does it work?

A weather or sounding balloon is a balloon (specifically a type of high-altitude balloon) that carries instruments aloft to send back information on atmospheric pressure, temperature, humidity and wind speed by means of a small, expendable measuring device called a radiosonde.

20

What are the types of weather instruments?

Typical weather stations have the following instruments:

Thermometer for measuring air and sea surface temperature.
Barometer for measuring atmospheric pressure.
Hygrometer for measuring humidity.
Anemometer for measuring wind speed.
Pyranometer for measuring solar radiation.

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