length temperature
3cm 20C
12cm 100C
(a)If the the mercury column is 5cm ,what is the correspnding temperature?
(b)When the temperature of the thermometer is 60C,how long is the mercury colimn?
Ans:
(a)Δθ / Δl
=100-20 / 12-3
=80/9
=8.89C/cm (1cm等於幾多度)
Δθ /Δl = 8.89
Δθ / 5-3 = 8.89
Δθ = 17.8C
therefore θ =20+17.8=37.8C
(b)Δθ / Δl = 8.89
60-20 / Δl = 8.89
Δl = 4.50cm
therefore l= 3+4.5 =7.5cm
(1)有顏色果d我5係好明點解係咁計,另外點解(a) length 要減 但 (b) 就係temp.要減 ? 點解5係兩題都係剩減length or temp?
(2)仲有冇其他方法可以計?------->(可以5使答)
p.s.最好就答哂,如果真係5得ge 話就答得幾多得幾多la!!!!!^^
thx
更新1:
仲有冇其他ratio or other (no graph) ge 方法可以計?--------可以5使答