Question

Yang tau cara kerja no 12 dan 13

Answer 1

12.
Vtercelup = 1/5 Vb
ρf= 1000 kgm-3
g= 10ms-2
ρb = (ρf . Vt)/Vb = (1000. 1/5 Vb)/Vb= 200 Vb/Vb = 200 kgm-3

13.
V0= 1000 cm3
αal= 26. 10⁻⁶ --> φal= 3 αal= 78. 10⁻⁶
φalkohol= 20. 10⁻⁵
ΔT= 50°C
ΔVal= V0. φal. ΔT = 1000. 78.10⁻⁶. 50 =3.9 cm3
ΔValkohol= V0. φalkohol. ΔT= 1000. 20. 10⁻⁵. 50 = 10 cm3
Valkohol tumpah = 10 - 3.9= 6.1 cm3