1.1 how are physical quanities measured
暂无描述。系统推荐的高质量记忆内容,适合每天坚持背诵学习。
卡片预览 (24 张)
1h in seconds
3600s
lab apparatus used to measure time
digital stopwatch
types of stopwatches
1.digital 2.mechanical 3.analogue
smallest division of digital stopwatch
土0.01s (a hundredth of a second)
smallest division of analogue stopwatch
土0.1s (a tenth of a second)
temperature in k=
temperature in degree celcius + 273
commonly used thermometers in laboratory
• alcohol and mercury thermometer • digital thermometer
data loggers
used to measure temperature and collect data automatically
range of temperature in alcohol thermometer
-10°C - 110 °C
1m in dm (decimeter)
10dm
1m in mm (millimetre)
1000mm
10dm to cm
100cm
accuracy of meter rule
土0.1cm to 土0.5cm
1kg in g
1000g
1t (tonne) in kg
1000kg
1kt (kilotonne) in t (tonne)
1000t
1kt (kilotonne) in kg
1 000 000 kg
apparatus to measure mass
beam balance, electronic mass balance
1m^3 in dm^3 (cubic decimeter)
1000dm^3
1m^3 in cm^3
1 000 000cm^3
apparatus to measure volume
pipette volumetric flask measuring cylinder burette
pipette
measures accurate fixed volumes (eg. 10.0cm^3 or 25.0^3)
volumetric flask
measures accurate fixed volumes that are larger (eg. 100cm^3 or 250cm^3)
measuring cylinder
measures a range of volumes to nearest 0.5cm^3 (eg. 31.5cm^3 or 250cm^3)