meter scale definition

The decibel (dB) is a unit used to express the ratio of two values of a physical quantity, often power or intensity. BD-10. Medical Definition of pH meter. However, it was soon discovered that the length of a seconds pendulum varies from place to place: French astronomer Jean Richer had measured the 0.3% difference in length between Cayenne (in French Guiana) and Paris. , farm tanks etc.) This unit of measurement is called a meter. manufacturer or service provider or, used for direct sales and pre-pack scales (used for determining quantity and monitoring, ) and all ancillary devices (eg. He proposed a universal toise (French: Toise universelle) which was twice the length of the seconds pendulum. Subsequent definitions of the meter have since been chosen to hew as closely as possible to the length of that first meter bar, despite its shortcomings. The resulting scale is nonlinear, and at either scale end, the accuracy is poor. A noise level chart showing examples of sounds with dB levels ranging from 0 to 120 decibels is given below. Medical Author: William C. Shiel Jr., MD, FACP, FACR; pH meter: A simple and speedy device to measure the acidity and alkalinity of a fluid. A sound 1,000 times more powerful than near total silence is 30 dB. Found 705 sentences matching phrase "meter-scale".Found in 20 ms. Definition of meter (Entry 3 of 6) : the base unit of length in the International System of Units that is equal to the distance traveled by light in a vacuum in ¹/₂₉₉,₇₉₂,₄₅₈ second or to about 39.37 … The BD-10 is a pin-type meter has both wood scale and reference scale settings. noun. A 1 to 14 scale that measures alkalinity or acidity: pH7 is neutral, below 7 is acid and above 7 is alkaline. This unit ‘, This is another reason why this instrument is also referred to as a, When constant pressure is applied, a microphone can be traced by the voltage produced, called the, This instrument is usually used to measure noise and serves as a level meter. 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In Minnesota, a commercial scale or meter is defined as any scale or meter used to buy or sell commodities or services for which the price is determined by the measurement on that device. Decibel meters are also known as sound-level meters. For practical purposes however, the standard metre was made available in … electricity and gas, and gasoline dispensers) inspected and more than 400, prototype measuring instruments evaluated, surface, comprising a boroxine-linked or a boronate-linked network and has a two dimensional nano-, Materials patterned at the nanometer - one billionth of a. , such as quantum dots, nanocrystals and photonic crystals. Physical Standards (Pipe provers, open provers, pressure gauges, thermometers, master, A photolitography apparatus and mask for nano. Conductivity (or specific conductance) of an electrolyte solution is a measure of its ability to conduct electricity. To ensure that it is the same meter used everywhere, the standard meter was defined by scientists as below: Definitions of the meter (1798) – One decibel is one-tenth of one bel, a unit name named in honour of Alexander Graham Bell. Title: Time Line for the Definition of the Meter Author: William B. Penzes Created Date: 12/16/2010 3:20:18 PM ProScan. Your email address will not be published. The analogue test meter typically contained a single meter and movement, and series and parallel resistors were used to provide the correct ranges. See more. In this, the reference pressure in air is set as the threshold value of perception of a human. If you wish to learn more physics concepts with the help of interactive video lessons, download BYJU’S – The Learning App. As far as power is concerned, the sound of the thunderclap is approximately 1,000,000,000,000 times more powerful than the smallest audible sound. An ammeter usually has low resistance so that it does not cause a significant voltage drop in the circuit being measured. Typically a large rotary switch in the centre of the front panel under the meter was used to select the required range. They come from many sources and are not checked. Sound can be measured with a device called decibel meter. Millimeter definition, a unit of length equal to one thousandth of a meter and equivalent to 0.03937 inch. Sound travelling in acoustic means that the sound is travelling through the air. It is used as a unit of sound pressure level. The device consists essentially of a weighted, sealed, long-necked glass bulb that is immersed in the liquid being Be warned. How to pronounce meter (audio) \. The Weights and Measures Division inspects commercial scales and meters. Recent Examples on the Web The scientists found four distinct layers, each a few centimeters thick, of brownish, millimeter-scale crystals. If human beings are exposed to loud noises for a brief period, it doesn’t cause much harm, but continuous exposure can do physical damage like. Durometer definition is - an instrument for measuring hardness. The human ear has the ability to handle an immense range of different sound levels. Nanometer definition, one billionth of a meter. The decibel is used to express the ratios of power or amplitude in arithmetic ratios in electronics. temperature, pressure) that affect the determination, of nano- medicine, that is Medicine on a billionth of a, the identification of four types of depositional environments (peritidal, lagoonal, sand shoal, outer-shelf) that formed, is a homogenous mix ceramic and metal phase (and/or bioglasses) when analysed on a micro, recent successes such as the doubling of the energy of 42 GeV electrons in a, magnesium oxide or other agent may be nano-, , which scale may provide unique particle charges that, • nearly 900 000 measuring instruments (i.e. Analog voltmeters move a pointer across a scale in proportion to the voltage of the circuit; digital voltmeters give a numerical display of voltage by use of an analog-to-digital converter. A sound 100 times more powerful than near total silence is 20 dB. We can define decibel as: A unit of measurement used to express the ratio of one value of a power or field quantity to another on a logarithmic scale, the logarithmic quantity being called the power level or field level, respectively. The goal of the Truth-O-Meter is to reflect the relative accuracy of a statement. He found the value of 440.5 lines of the Toise of Châtelet which had been recently renewed. Using a postage scale with a meter allows a business to take care of every step of the mailing process in the office, rather than obliging the business to send someone to the post office to put postage on the mail. Abbreviation: mm See more. Therefore, to express sound levels meaningfully in numbers that are more flexible, a logarithmic scale is used, rather than a linear one. Be it an analog coil-actuated meter, a digital ADC, or even a DAC (though it is used to mean the output range available, not measurement), full scale is now used to mean the complete minimum to maximum range of something. Durometer definition, a device for measuring the hardness of materials, especially metals. The meter scale is used as the standard instrument to measure length. See more. In 1671 Jean Picard measured the length of a "seconds pendulum" (a pendulum with a period of two seconds) at the Paris observatory. A typical sound-level meter can be switched between a scale that reads sound intensities uniformly for most frequencies—called unweighted—and a scale that introduces a frequency-dependent weighting factor, thus yielding a response more nearly like that of the human ear. An ammeter (from ampere meter) is a measuring instrument used to measure the current in a circuit.Electric currents are measured in amperes (A), hence the name. A new unit of length, the metre was introduced – defined as one ten-millionth of the shortest distance from the North Pole to the equator passing through Paris, assuming an Earth's flattening of 1/334. Cookies help us deliver our services. There are 100 centimeters in 1 meter. As nouns the difference between meter and scale is that meter is meter (unit of measure, 100 cm) while scale is (obsolete) a ladder; a series of steps; a means of ascending or scale can be part of an overlapping arrangement of many small, flat and hard pieces of keratin covering the skin of an animal, particularly a fish or reptile or scale can be a device to measure mass or weight. The metric scale is the system of measurement used in the metric system. Accurately track fitness and weight goals with scales from basic weight measurement to analyzing BMI, hydration, calorie intake, and more. The different scales are obtained through the use of range switching, meter mechanism shunts, and different potential sources. Recent Examples on the Web Cast at 78a durometer, these wheels are deceptively fast despite their garbage truck-like appearance. There are many comparisons that are used to describe separate levels of pressure. The term, widely used in chemistry, biology, and agronomy, translates the values of the concentration of the hydrogen ion —which ordinarily ranges between about 1 and 10 −14 gram-equivalents per litre—into numbers between 0 and 14. So, the intensity of a sound is measured using decibel. Abbreviation: nm See more. Required fields are marked *. As the human ear is incredibly sensitive, you can hear everything from your fingertip brushing lightly over your skin to a loud thunderclap. An ohmmeter is an electrical instrument that measures electrical resistance (the opposition offered by a substance to the flow of electric current) . 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