4. You are given the following masses and volumes for various blocks of materials. The mass of 1cm^ 3 of water  is 1g.From them choose which one will float in water? (A)materialW:mass=12g,volume=10cm 3 (B)materialY:mass=30g,volume=28cm 3 (C)materialX:mass=22g,volume=20cm3 (D)materialZ;mass=12g,volume=13cm3

Asked by shammiaryan2 | 28th Sep, 2021, 10:45: AM

Expert Answer:

The correct option is d) materialZ;mass=12g,volume=13cm3 
 
mass of water = 1 g, volume = 1 cm3 , density of water = 1 g/cm3 
 
density of material W = 12/10 = 1.2 g/cm3 
density of material Y = 30/28 = 1.07 g/cm3 
density of material X = 22/20 = 1.1 g/cm3 
density of material Z = 12/13 = 0.92 g/cm3 
 
So from all materials given, material Z is less dense than water thus, material Z will float in water others will sink in water. 

Answered by Shiwani Sawant | 29th Sep, 2021, 11:52: AM