EXPERIMENT 3 Measurement Instruments (Mass, Volume, and Density) T Advance Study

Question

EXPERIMENT 3 Measurement Instruments (Mass, Volume, and Density) T Advance Study Assignment Read the experiment and answer the following questions. is the least count of a measurement instrument, and how is it related to the number of significant figures of a measurement reading? 2. Does a laboratory balance measure weight or mass? Explain. What is the function of the vernier scale on the vernier caliper? Does it extend accuracy or precision? Explain. 3. istinguish between positive and negative zero errors and how corrections are made for such errors. For what kind of error does a zero correction correct?

Explanation / Answer

1. The smallest value that can be measured by the measuring instrument is called its least count.

The number of significant figures is determined by the least count of an instrument. for example if least count is 0.01, then we will round up our result to 2 significant figures after decimal.

2. A laboratory balance is a two-pan balance. It will always give us the reading of mass not only on earth but in anywhere because here we measure the mass of one object relative to another. The same may not be true in case of a spring balance because in this case the reading depends on the amount of force exerted on the spring.

3. The function of a vernier scale is to increase the precision by increasing the least count. The readings of the vernier callipers may not be accurate but will be more precise as compared to other measuring instruments like ruler. Precision implies the level of variation that lies in the values of the several measurements. lesser the variation, more is the precision.

4. . Positive zero error occurs when the ‘0’ marking of the vernier scale appears after the ‘0’ marking of the main scale. The error is +x cm. To correct the reading, we subtract the error from the measurement.

Negative zero error occurs when the ‘0’ marking of the vernier scale appears before the ‘0’ marking of the main scale. The error is -x cm. To correct the reading, we add the error with the measurement.

Related Questions

Navigate

• Browse (All)
• Browse E
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.