Lab Report

AS202

PHY400

EXPERIMENT 1: MEASUREMENT

PREPARED FOR : PM DR. MAHADZIR HJ. DIN

BY : NORHANIZA BINTI AB RAHMAN

ID NO. : 2012891782

GROUP : ASB1Ac

DATE: 3 OCT 2012

PRE- LAB QUESTIONS 1

1. Is it possible to get an exact measurement without any uncertainty (error)?

No, because every apparatus have their uncertainty. Besides that, the error will occur in every experiment, either systematic or random error.

2. What is zero error and the reading uncertainty (error) for

a) A meter rule

± 0.1 cm

b) A vernier caliper

± 0.01cm

c) A micrometer

±0.01 mm

3. State the number of significant figures for each of the following numbers

a) 17.20

4 significant figures

b) 0.0270

3 significant figures

c) 12000

5 significant figures

d) 3.1400

5 significant figures

4. Perform the following calculations and give the answer with the correct significant figures.

a) 23.90 x 3.81 = 91.1

b) 10.27 ÷ 2.8 = 3.7

c) 4.917 x 1.5 x 12.31 = 91

5. State two major differences between a systematic and a random error

Systematic error | Random error |

Difference between the real value and value found during experiment. | The error because of some calculation mistakes. |

It cannot be reduced by taking the average value of data taken repeatedly. | This error can be reduced by taking the average value of data taken repeatedly |

6. Does the laboratory balance measure weight or mass? Explain.

The laboratory balance is to measure mass. This is bacause mass is to measure the number of particle of matter in substance or objects but weight does not. Besides that, mass is not influence by the gravity.

7. What is the function of the vernier scale on the vernier caliper? Does it extend accuracy or precision? Explain.

The function of the...