How to use the scale to read, and which digit to estimate the scale reading

In general, it is estimated to read the next digit of the minimum tick value. If the minimum scale of the triangular ruler is mm, and the length of 2cm is measured with it, if it is exactly aligned on the scale line, the correct record should be, where is the number accurately read by the ruler surface, and since there is no estimated reading, it is necessary to add "0" to the 10th decile of the millimeter.

Note: The corresponding units must be written when recording the measurement results.

In principle, the length measurement requires a measurement, if the measurement range is less than the actual length, it is necessary to move the scale to measure several times, which will produce a large error.

Extended Materials. Proper use of the scale:

1) The scale should be placed on the side with the scale and close to the object to be measured.

2) The line of sight should be perpendicular to the ruler surface during the reading.

3) Estimate the next digit of the graduation value and write down the value and unit.

4) Multiple measurements are averaged as the final measurement result.

The graduation value of the scale is generally 1mm, and the student range of the general specification is 10cm, 15cm, and 20cm

Measuring length with a scale is a fundamental skill in physical experiments, and it is also the basis for correct readings from other measuring instruments.

The estimate is the one digit after the graduation value.

Scale Reading = True Value + Estimated Value + Units.

Middle school physics only requires an estimate of the scale.

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In addition, the landlord said that the answer was right.

It depends on the accuracy of the scale used, if the accuracy is mm. Then the read value must be one digit below mm, that is, there is an estimated digit, if it is exactly 21cm, for the minimum scale is 1mm to read the scale, it must be written like this.

The scale reading is estimated to be the next digit of the smallest scale value. Accurate to the minimum scale but to estimate one bit, for example, the minimum scale is millimeters, then accurate to the millimeter is estimated to 0.1 millimeter, and the minimum scale is decimeters.

It should be accurate to the decimeter, and in general, it should be estimated to read to the next digit of the minimum scale value.

The method by which the scale reading is to be estimated

The scale should be placed on the side with the scale close to the measured object, and the line of sight should be perpendicular to the ruler surface when reading, and the index value should be estimated.

and write down the values and units, and take the average of multiple measurements.

As the final measurement result, the graduation value of the scale is generally 1mm, and the general size of the student scale is 10cm15cm20cm.

Scale measurement length is the basic skill of physical experiments, but also the basis of correct reading of other measuring instruments, in principle, the length of measurement requires a measurement, if the measurement range is less than the actual length, it is necessary to move the scale to measure several times, it will produce a larger error, the standard value estimation and the initial record value with the unit, multiple measurements to take the average to reduce the error value more accurate measurement paper thickness and wire diameter.

Readings should be read to two decimal places. When measuring the length of an object, the minimum scale is the reading of the scale according to the "significant digit in the measurement to the next digit of the accuracy of the instrument", that is, two decimal places.

This reading is an estimate. It is customary to estimate the minimum graduation value.

If the minimum division value is 2, then when estimating, the minimum division is divided into ten parts, and the estimated part to be measured accounts for several parts, and then multiplied by the minimum division value, that is, the estimated reading part.

When measuring, most of them should be estimated, and estimates should also be taken into account when calculating. Vernier calipers.

Stopwatch Dotting timer.

etc. do not need to be estimated; Length measurements, current, voltage, and resistance measurements, mass measurements, etc., need to be estimated.

Readings should be read to two decimal places. When measuring the length of an object, the scale is the smallest scale, and the reading of the scale is kept to the next digit of the instrument's accuracy, according to the "significant digits in the measurement are kept to the next digit of the instrument's accuracy".

This reading is an estimate. It is customary to estimate the reading in the unit of one-tenth of the minimum graduation value, if the minimum graduation value is 2, then when estimating, the minimum graduation is divided into ten parts, and the estimated part to be measured accounts for several parts, and then multiplied by the minimum graduation value, that is, the estimated reading part.

When measuring, most of them should be estimated, and estimates should also be taken into account when calculating. Vernier calipers, stopwatches, dot timers, etc., do not need to be estimated; Length measurements, current, voltage, and resistance measurements, mass measurements, etc., need to be estimated.

It is necessary to note the estimation of the spring meaning of the travel, that is, after the most hail of the scale and then estimate one by one, the measurement scale should be parallel to the length of the measurement, and the scale line should be aligned with the beginning of the object to be measured.

Here's how to use the scale:1. First of all, it is necessary to observe the zero scale, range and indexing value of the scale.

2. Correctly place the scale ruler: when measuring, the ruler should be along the measured length, not skewed, and the side with the scale should be close to the measured object, so that the zero scale of the scale ruler or a whole scale should be aligned with one end of the measured object (no wear zero scale line as the starting point).

3. Correct reading: when reading, the line of sight is facing the scale, and it is perpendicular to the ruler surface, and the next digit of the graduation value should be estimated and read; If the object to be measured is not aligned to a certain scale, it should be filled with zero, such as the length of the object measured with a millimeter scale is exactly 10 millimeters on the scale, and the reading should be read in millimeters or centimeters.

4. Correct recording: Measured values are made up of accurate values, estimates, and units.

Precautions for the use of the scale1. Select the appropriate scale according to the measurement length and the minimum scale needs.

2. The scale should be straightened, and the scale mark should be close to the object to be measured.

3. The line of sight is perpendicular to the scale and the measured object.

4. In addition to reading the minimum scale value and above, it is also necessary to estimate the next digit of the minimum scale value.

The scale reading is estimated to be the next digit of the smallest scale value. Accurate to the minimum scale but to estimate one bit, for example, the minimum scale is millimeters, then accurate to the millimeter to estimate the 0.1 millimeter, the minimum scale is the decimeter to be accurate to the decimeter, in general, should be estimated to read the next digit of the minimum scale difference.

The method by which the scale reading is to be estimatedThe scale should be placed on the side of the scale, and the line of sight should be perpendicular to the ruler surface when reading, and the next digit of the scale value should be estimated and read down the value and unit, and the average value of the scale should be taken as the final measurement result, the index value of the scale is generally 1mm, and the general specification of the student range is 10cm15cm20cm.

Scale measurement length is the basic skill of physical experiments, but also the basis of correct reading of other measuring instruments, in principle, the length of measurement requires a measurement, if the measurement range is less than the actual length, it is necessary to move the scale to measure several times, it will produce a larger error, the standard value estimation and the initial record value with the unit, multiple measurements to take the average to reduce the error value more accurate measurement paper thickness and wire diameter.

The five meetings are: 1. Recognition. That is, to correctly understand the zero scale, the minimum scale, and the measurement range of the scale;

2. Will put. The scale of the scale should be as close as possible to the measured object, and should not be skewed;

3. Will see. When reading, the line of sight should be perpendicular to the object to be measured and the scale;

4. Be able to read. In addition to reading the digits above the minimum scale, you should also estimate the digits below the minimum scale;

5. Remember. Recorded measurement data, including accurate values, estimates, and units.