PHISICS Created by : VIA WINDI HERAWATI Class : VII – B No. : 26.

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PHISICS Created by : VIA WINDI HERAWATI Class : VII – B No. : 26

Table of Contents A.  Advantage of Alcohol thermometer  Advantage of Mercury thermometer C.  Disadvantage of Alcohol Kinds of Thermometers D.thermometer  Disadvantage of Mercury thermometer D.Graphs

A. Kinds of Thermometers 1. Clinic Thermometer Physical Properties : This thermometer is usually used to measure a human body temperature The tube of the thermometer is filled with mercury The scale of the thermometer is designed from 35 o c until 42 o c In clinic thermometer there is found the part of capillary tube which is narrowing

2. Wall Thermometer Physical Properties : This thermometer is used to measure a room temperature Usually the thermometer is set on straight position on wall in a room The wall thermometer of the measurement has two measurement scale, those are Celsius and Fahrenheit scale

3. Six – Bellani Maximum and Minimum Thermometer Physical Properties : This thermometer is used to measure a maximum temperature, mainly inside glass house used for plantation as research object The thermometer consists of alcohol (now it is used creosote oil), mercury, and small steel pointer which is equiped by light spring as it is holder

B. Advantage of Alcohol and Mercury Thermometer 1. Advantage of Alcohol Thermometer Advantage : They are cheap They can be seen clearly as they are in red in color They are thermometric liquids It can measure a low temperature, because its freezing point is low (-115 o c) It can measure the temperature precisely, because it has large expansion coefficient Its expansion is regular

2. Advantage of Alcohol Thermometer Advantage : It can measure the temperature quickly and precisely It is does not make wet the wall of its place It has a visible meniscus, because its color is silvery shining. Its can measure high temperature, because its boiling point is high (365,9 o c).

C. Disadvantage of Alcohol and Mercury Thermometer 1. Disadvantage of Alcohol Thermometer Disadvantage : It cannot measure a high temperature, because its boiling point is low (78 o c). Its make wet the of its place It is colorless so it must be given dyestuff in order to be visible They have less surface tension They have less density

2. Disadvantage of Mercury Thermometer Disadvantage : It cannot measure very low temperature, because its freezing point is high (-40 o c). Mercury is poisonous, so it is harmful if its tube is broken Its price very high

D. Graph 1. Bar graph

2. Line graph