A wooden block of relative density 0.4 floats in a liquid of density 1600 kg m\(^{-3}\). What fraction of its volume is immersed?

PaulafromMars

2 months ago

Step 1: What does relative density = 0.4 mean?

👉 Relative density = (density of object) ÷ (density of water)

So:

0.4= density of object ÷ 1000

Density of block = 0.4 × 1000 = 400 kg/m³



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Step 2: Use the main idea

You remember the rule:

👉 Fraction immersed = (density of object) ÷ (density of liquid)


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Now YOU finish it 👇

We have:

Object density = 400

Liquid density = 1600


So:
400/1600 = 0.25

olamighty2008

2 months ago

how is 160×4= 400

Daywalker5

2 months ago

I no come understand

DominionDDOC

2 months ago

density of block is 0.4 ×1600= 640

TreasureBahmou

2 months ago

like I don't get it

gemstoneprecious

2 months ago

for the place you said 4 ×160=400 is not correct 4×160=640

toxicpapa123

2 months ago

160*4 is sooooo not 400 sir