A sealed packet of mass 500g has density 1.43g/cm3. when placed in alcohol (density 0.8g/cm3) the upthrust on the packet will be

A.250gf    B.280gf   C.350gf      
D.300gf

IT IS URGENT PLEASE FAST!!!!

Dear Student,
Please find below the solution to the asked query:

Since, density = massvolumevolume = massdensity = 500 g1.43 g/cm3 = 350 cm3Upthrust, w = V σ gwhere, σ is density of liquid = 0.8 gm/cm3  and g = 9.8 m/s2w = 350 × 0.8 ×9.8 = 280 g m/s2 = 280 g f




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  • 2
Density = Mass/Volume
  1.43     = 500 / Volume
  1.43     = 500 / V
   V        = 500 / 1.43
   V        =  50000 / 143
   V        =  349.65 cm3  
When placed in Alcohol,
Density = Mass / Volume
 0.8       =  500  /  V
 V        =  500 / 0.8
 V        =  5000 / 8
V       =    625 cm3
  • -6
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