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Measuring Tools
Measuring instruments includes a vast amount of tools and instruments used for measuring. This would include micrometers (various types for various applications), scaled rules, durometers, spectrometers, tape measures, dumpy levels, spirit levels, combination sets, gauge blocks, vernier calipers, dial indicators, inside and outside calipers, etc.
1,282 Questions
What are the tools used to measure in science?
There are too many measuring tools in science to list them all, but I'll list a couple.
- Ruler (measuringsmall distances)
- Pipettes & Graduated Cylinders (measuring liquids)
- Scales (measuring weight and mass)
- Anemometers (measuring wind speeds)
- Thermometers(measuring temperatures)
In principle, you can make ALL scientific measurements with:
- Ruler
- Clock
- Pendulum
- Scale
- Ammeter
- Light meter
1)Pan Balance
2)Floating Plate
3)Chemical Balance
4)Alcohol Thermometre
5)Hourglass
Where is 7.8 inches 0n a ruler?
10mm is 1cm. Therefore, 70mm is 7cm. Just move the decimal point over to the left when you are upsizing the unit.
Why is a meter rule used to measure the initial length of a bar?
The length of a meter was originally determined with a metal reference, keep to this day in Paris, France.
What is the main difference between protein electrophoresis and nucleic acid electrophoresis?
There are many similarities and differences between protein and DNA electrophoresis.
Similarities:
- PAGE protein and DNA electrophoresis both cause separation by size, creating bands that are viewed by the scientist or a machine. The smallest segments more the fastest due to less friction with the surface of their medium or equipment.
- The movement of charges through the medium is what causes the DNA or proteins to move. Electrons move from the negative to positive end of the gel or capillary tube.
Differences:
- In PAGE protein electrophoresis, a polyacrylamide gel is used to prevent convection from altering the movement of the proteins. If the proteins are charged, and there is a worry that the charge will affect the mobility of the protein segments, 1% SDS can be added to get rid of the mass/charge issue. This way, only the mass of the segment determines how far it moves. In DNA capillary electrophoresis, the size of the capillary is so small that it does not have room for convection to occur (it is only 20-50 microns wide). Thus, there is no medium in the capillary but DNA itself.
- In protein electrophoresis, the proteins are often dyed so their movement can be viewed with the naked eye, or a machine. With DNA capillary electrophoresis, DNA strands are made through DNA replication with dNTPs that are fluorescently labeled for the different nucleotides. Each base is labeled a different color. A fine laser lights up the DNA strand in the capillary tube and reads what color fluoresces. This is how the nucleotide is identified.
- Protein PAGE electrophoresis is used to determine the purity of a protein sample. It can also be used to see how large the chains are that make up a multi-chain protein if a denaturing agent is added. DNA electrophoresis is used to get the order of nucleotides in a DNA sequence. It is done by chopping the DNA sequence into many smaller bits and sequencing them, then putting them back together by lining them up according to sequence overlaps. This is called the "shotgun" method. Protein electrophoresis can figure out the order of about 15-20 amino acids by a similar method, but DNA electrophoresis can get up to 1000 nucleotides (~300 amino acids). DNA electrophoresis is limited by the low probability that the DNA sequence would be cut into a segment greater than 1000 nucleotides.
What instrument is used by technicians for measuring current voltage and resistance?
The instrument is called a multi-meter. Multi part meaning that the meter has distinct functions. One setting can measure voltage, another function can measure resistance and the third function can measure a limited amount of current.
The reason the current is limited is because the meter has to be connected in series to the circuit that it is measuring. There will be a maximum rating on the instrument stating the maximum amount of current allowed. Many times this is a DC current and it is not to be used for measuring AC current.
For higher current measurements a clamp on ammeter should be used.
What a three things a vernier caliper measures in a garage?
1. A shaft diameter
2. Length of bolt
3. Inside of a hub
What is a meniscus why it necessary to know about it when measuring liquids?
The meniscus is the concave line of liquid that forms in a graduated cylinder (measuring volume) due to that liquid's adhesion (the tendency to want to stick to other things). When measuring a liquid's volume in a graduated cylinder, you read the volume from the bottom of the meniscus. Therefore, the meniscus does not measure anything, it is where you measure a liquid's volume from.
What is the measurement of the average kinetic energy of the molecules of a substance?
temperature is the average kinetic energy of a particle
Tool use to calibrate a micrometer?
Calibrating micrometers: For quick reference the supplied test piece can be used. For calibrating a micrometer, gauge blocks are used.
What is the cause of resistance and how the resistance of wire can be determind?
The cause of resistance is the opposition to the flow of charges.Resistance occurs due to the collisions between charges inside a substance.
The resistivity of a wire can be found out by using a meter bridge or a slide wire bridge.
What is the function of the adjusting screw in the Bourdon gauge?
Bourdon gauge is a type of aneroid pressure gauge consisting of a flattened curved tube attached to a pointer that moves around a dial. As the pressure in the tube increases, the tube tends to straighten and the pointer indicates the applied pressure.
What are vernier calipers used for?
The correct spelling would be vernier callipers, or vernier calipers depending on which country you come from. They are used for measuring the inner distance between two surfaces. (e.g. if your tube material is 1 cm thick, and 5 cm across on the outside surface, the vernier calipers would show a distance of 3 cm.
What is the loudness of sound of the normal conversation?
The sound of a normal conversation is 60dB (decibels) and a close range jet is 140dB. This makes a jet at close range over 2 times as many decibels than a close range jet.
The sound of a normal conversation is 60dB (decibels) and a close range jet is 140dB. This makes a jet at close range over 2 times as many decibels than a normal conversation.
The above answer is FALSE:
The decibel scale is logarithmic and thus a 140 dB sound would be 10^14 above 0 decibel; the 60 dB sound would be 10^6 above 0 decibel. Thus the close range jet is around 10^(14 - 6) = 10^8, or 100,000,000 times the loudness of a normal conversation.
There are 2 things that can be called a micrometer:
1/ A device for measuring short distances accurately. Typically to better than 1 thousands of an inch (thou) or 0.01mm. They look a bit like a small G clamp, something is placed between the jaws and it is lightly tightened, the thread has a gauge on it so you can see how big the thing between the jaws is.
2/ A very small distance, 1 millionth of a meter. Also written μm. (Or sometimes um.)
Additional Information
The above answer needs to be qualified. In fact, the above answer only applies to American English. In British English,
1. A micrometer is an instrument for measuring small thicknesses or diameters, as per answer 1, above.
2. The unit of measure is called a micrometre.
In other words, in British English, a meter is a measuring instrument, whereas a metre is a unit of measurement.
Does a mercury barometer or aneroid barometer measure air pressure?
mercury has a sudden fall and then the barometter measure it and when i mean by fall i mean air pressure so yeah it's cool I knoe it doesn't make sense but Im just writing this anyway. Even though it's pure glorius silly you know what. I PUT THAT WORD BUT THEY WON'T LET ME POST THIS STUPID ANSWER
How do you calculate least count of micrometer?
Hi, heres how you calculate least count of a micrometer. Use the given formula:
Least Count (L. C) = Pitch/no. of divisions on micrometer barrel(thimble)
where,
Pitch = distance travelled by thimble on linear scale in one rotation.
Hi, heres how you calculate least count of a micrometer. Use the given formula:
Least Count (L. C) = Pitch/no. of divisions on micrometer barrel(thimble)
where,
Pitch = distance travelled by thimble on linear sacle in one rotation.
Why is it necessary to include units when measuring and dimensioning?
Because a measurement is pointless without the unit. How would you feel if someone offered to pay you 25 per hour and then, after a day 's slog, they told you it was 25 cents an hour? If you had assumed 25 dollars that was your own fault!
Or you paid a 70 centilitres bottle of wine and you were given a 70 microlitres!
What is a measuring tape used for?
- Metric Rulers and meter sticks are used to measure short lengths and distances. Both devices are marked in centimeters and millimeters.Metric Rulers are generally 15 cm (6 inches) and 30 cm (12 inches) long.
a tiny ruler that you know the measurements of, and you use it to calibrate the ocular lens of a microscope
What does a marine chronometer do?
For chronographs used in paintball and similar:
The modern chronograph consists of two sensing areas called chronograph screens, which contain optical sensors that detect the passage of the bullet. The bullet is fired so it passes through both screens, and the time it takes the bullet to travel the distance between the screens is measured electronically.
What will do first before using a new type of vernier scale?
There are several things that you should do first before using a new type of Vernier caliper. You should ensure that you fully understand how it works and test it elsewhere before using it in the real project.
