11/20/2023 0 Comments Sliding ruler toolDrop a comment below if you encounter any difficulties. A cursor is fixed in the center of the 'window' to allow for accurate. The metal 'window' is inserted over the slide rule to act as a place holder. The sliding center bar is sandwiched by the outer bars which are fixed with respect to each other. The final calculation will be $3.34 \, – 0.04 = 3.30$ cm, which is the same as my method. The slide rule is actually made of three bars that are fixed together. Hence, you will have to SUBTRACT 0.04 cm from ALL measurements in order to get the true measurement. Normal method: Since the zero error is +0.04 cm, this means that all measurements taken by the vernier calipers will be larger by 0.04 cm. This means that once you have determined the nature of the zero error (positive or negative), you can just subtract the zero error and be sure that your final answer is correct.Ĭonsider a zero error of +0.04 cm. The subtraction is done in the above case is to have an elegant way of obtaining a resultant addition: $3.34 + 0.04 = 3.38$ and to make it COMPATIBLE with positive zero error. Hence, you will have to ADD 0.04 cm to ALL measurements in order to get the TRUE measurement. The slide rule (also known colloquially in the United States as a slipstick 1 2) is a mechanical calculator (one of the simplest analog computers) 3 4 hand -operated by sliding two rulers to perform multiplication and division primarily, and possibly exponents, roots, logarithms, and trigonometry. Since the zero error is -0.04 cm, this means that all measurements taken by the vernier calipers will be SMALLER by 0.04cm. If you do not understand the subtraction of the negative zero error from the measurement, please read on. Zero error: – 0.04 cm (negative because the vernier scale is to the left) (Meaning: get rid of the zero error in the measurement or take into account the zero error) The reading on the top is the measurement obtained and the reading at the bottom is the zero error.
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