physics task
DESCRIPTION
PHYSICS TASK. Name : Dea Ayu Oktaviani Class : 7 A. A . Different about alcohol Thermometer and mercury thermometer. Advantage of alcohol thermometer : ~It can measure alow temperature , because its frezzing point is low (-115°c) - PowerPoint PPT PresentationTRANSCRIPT
Name : Dea Ayu Name : Dea Ayu OktavianiOktavianiClass : 7 AClass : 7 A
Advantage of alcohol thermometer :
~It can measure alow temperature , because its frezzing
point is low (-115°c) ~It can measure the temperature
precisely , because it has large expansion coefficient ~ Its expansion is regular
Advantage of mercury thermometer : ~It is visible , because its colour is silvery
shining
~Its expansion is regular
~It does not make wet the wall of its place ~It can measure a high temperature , because
its boiling is high (356,9°c) ~It can measure the temperature quickly and
precisely
Disadvantage of alcohol thermometer : ~ It cannot measure a high temperature , because its boiling point is low (78°c) ~ It makes wet the wall of its place ~ It is colourless so it must be given dyestuff
in order to be visible
Disadvatage of mercury thermometer : ~It cannot mesure very low temperature , because its frezzing point is high (-40°c) ~Mercury is poisonous , so it is harmful if its
tube is broken ~Its price is very high
~CLINIC THERMOMETER
Properties : 1.This thermometer is usually used to measure a human body temperature 2.The tube of this thermometer is filled with
mercury 3.The scale of the thermometer is designed
from 35°c until 42°c
~WALL THERMOMETER Properties : 1.This thermometer is used to measure a room 2.Usually the thermometer is set on straight
position on the wall in the room 3.This therometer of the measurement has two
measure- ment scales , those are celcius and fahrenheit
scale
~SIX-BELLANI MAXIMUM MINIMUM THERMOMETER Properties : 1.This thermometer is used to measure a maximum temperature , mainly inside glass house used for plantation as rese- arch object 2.This thermometer was found by James Six (1731 –
1793)and english scientist in the last of 18th century then it developed by Angelo Bellani
3.This thermometer consits of alcohol(now it is usedcreosote oil) , mercury, and small steel pointer wich isequiped by light spring as its holder
• Data of plant growth (on table)
TIME (DAY) PLANT HEIGHT (CM)
0 2.8
2 3.5
4 4.6
6 5.4
8 6.4
• Data of plant growth (on line graph)
• Data of sell cookies at Irin snack (On table)
TIME (MONTH) COOKIES
JANUARY 430
FEBRUARY 270
MARCH 320
APRIL 440
MAY 590
• Data of sell cookies at Irin snack (on bar graph)