Two cubes each weighing exactly 20g are taken one of iron (density =8 multiple of 10^3 kg/m^3) and other of marble ( density =3 multiple of 10^3 kg/m^3 ).If they are immersed in alcohol and weighed again
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Explanation:
Pressure at A=fuly×g×20100
PA=1300×10×20100
PA=2600N/M2
Pressure at B =foil×g×h+fHh×g×(20−h)100
PB=800×10×h100+13.6×103×10×(20−h)100
PB=80h+1360(20−h)
As PA=PB,
⇒2600=80h+27200−1360h
⇒1280h=27200−2600
⇒1280h=24600
⇒h=246001280=1921875
h=19.22cm
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