September 23, 2010 IOT POLY ENGINEERING I1-17 DRILL: LETTER YOUR RESPONSES ON A SEPARATE SHEET OF PAPER. RESPONSES WILL BE COLLECTED Answer these questions in complete sentences. 1)What are the consequences of coming late to class without a pass. 2)What are the consequences of talking in class when the teacher is talking. 3)Why should you not talk when the teacher is talking? 4)What are the consequences of talking in class when another student is speaking to the class. 5)Why should you not talk when other students are speaking to the class. 6)What are the consequences of having more than two detentions?

IOT POLY ENGINEERING I1-17 METROLOGY is the science of measurement, based on the Greek word ‘metron’. METROLOGY should not be confused with meteorology. Yesterday, with a partner, you were to discuss and make a list of the following: 1.Why do we measure? 2.What do we measure? 3.How do we measure? 4.When do we measure? 5.Where do we measure? 6.Who measures?

IOT POLY ENGINEERING I1-17 INTRODUCTION TO METROLOGY

IOT POLY ENGINEERING I1-17 Measuring instruments Ruler Thermometer Barometer Clock Scale Voltmeter GPS Hydrometer Viscometer Graduated Cylinder Radar Gun Speedometer Tachometer Accelerometer Spectrometer Protractor Compass Sphygmomanometer

What do we measure? Length – Length Area – Length 2 Volume – Length 3 Time – Time Speed – Length/Time Acceleration – Length/Time 2 Mass Density - Mass/Volume

Fundamental Measurements International System of Units has 7 basic units Length – meters Time – seconds Mass – kilograms Amount of Material – moles Light Intensity – candela Electrical Current – ampere Temperature - K

IOT POLY ENGINEERING I1-17 We will now look at 3 of the 7 base units in the International System of Units (SI).

IOT POLY ENGINEERING I1-17 LENGTH

IOT POLY ENGINEERING I1-17 MASS

TIME IOT POLY ENGINEERING I1-17

IOT POLY ENGINEERING I1-17 "METROLOGY is the science and art of measurement. Measurement is extracting information from nature or from devices people have engineered. It is also about the uncertainty in the extracted data, communicating it to other people in a standard way, and making them confident in our measurements by establishing traceable measurement systems.“ Copyright © Newton Metrology Ltd. You will now receive a 4-sided concise summary of the International System of Units (SI). Read and study this summary now, as it may help you to find some answers to the homework.

September 23, 2010 IOT POLY ENGINEERING I1-17 HOMEWORK: LETTER your answers. Use complete sentences. Define the following 10 terms: STANDARD, ACCURACY, PRECISION, CALIBRATION, TRACEABILITY, DERIVED UNIT, BASE UNIT, ERROR, PERCENTAGE OF ERROR, UNCERTAINTY BRING YOUR RULER, PROTRACTOR, AND COMPASS TOMORROW.