Unit - 1 Measurement

 Unit - 1 Measurement

Summary

1.Mass, length, area, volume etc. are called physical quantities.

2. The measurement of the local system is not the same in all places.

3. The measure that is accepted all over the world is called authentic measure (Katabalambacham Galasht).

4. Following are the different types of measurements:

  (a) F.P.S. : Foot-pound-second system

  (b) C.G.S. : Centimeter gram second system

  (c) M.K.S. : Meter Kilogram Second System

5. The distance between two points is called length.

6. The authentic unit of measuring length is meter.

7. The amount of matter in an object is called mass.

8. Physical mass is measured by scales. The unit of mass is kilogram.

9. The period between two events is called time.

10. The unit of time is second. Time is measured by a clock.

Fill in the blank 

(a) An object with more matter has more mass. 

(b) The period between two events is called time. 

(c) The mass of an object is measured by a balance.

Choose one correct answer from the given answers: 

(a) Which is the standard unit of measurement of length? 

(a) feet (b) yards (c) inches (d) kilometers 

Answer: (d) kilometers

(b) How many seconds are there in 1 day?

(a) 86400 seconds (b) 84600 seconds

(c) 48600 sec (d) 68400 sec

Answer: (a) 86400 seconds

(c) What is the standard unit of mass?

(a) pound (b) kilogram (c) dharni (d) ton

Answer: (b) kilogram

(d) The measurement taken from which system is not correct?

(a) Local System (b) FPS. system

(c) C.G.S. System (d) M.K.S. system

Answer: (a) Local System

Write answers to the following questions: 

(a) What is the authentic unit? 

Answer: An authentic unit is a unit of measurement that is based on a standard that is universally accepted.

(b) Definition of mass article.

Answer: Mass is the amount of matter in an object.

(c) What is the basic unit of time?

Answer: The basic unit of time is the second.

(d) Write two errors in traditional measurements.

Answer: Two errors in traditional measurements are:

* They are not based on a standard that is universally accepted.

* They are not consistent with each other.

(e) Article in full form.

Answer:

* M.K.S. - Meter, Kilogram, Second

* C.G.S. - Centimetre, Gram, Second

* F.P.S. - Foot, Pound, Second

(f) Why is authentic measurement necessary? Confirm with examples.

Answer: Authentic measurement is necessary because it ensures that measurements are accurate and consistent. This is important for a variety of reasons, including:

* Safety: Accurate measurements are essential for ensuring the safety of products and services. For example, if the weight of a bridge is not accurately measured, it could collapse.

* Quality control: Accurate measurements are essential for ensuring the quality of products and services. For example, if the size of a piece of clothing is not accurately measured, it could not fit the customer properly.

* Scientific research: Accurate measurements are essential for scientific research. For example, if the temperature of a chemical reaction is not accurately measured, the results of the experiment could be inaccurate.