Question

calculate pressure exerted by by 0.8 metre vertically length of alcohol of density 0.8 gcm in SI unit

Answer 1

p=h*row*g
given: h=0.8m
row=0.8 g/cm^3
=800kg/m^3
g=9.8m/sec^2
p=0.8*800*9.8
=6272pascal.

Answer 2

Pressure = Force / Area
= mg / A
= (V × d × g) / A ………[∵ Mass = Volume × Density]
= (A × L × d × g) / A …………[∵ Volume = Area × Length]
= Ldg
= 80 cm × 0.8 g/cm³ × 980 cm/s²
= 62720 g/(cm s²)
= 62720 × 10⁻³ kg / (10⁻² m s²)
= 6272 kg / (m s²)
= 6272 Pa

Pressure exerted is 6272 Pa