Question

please answer........! both questions

Answer 1

HELLO DEAR,

(1) Mass of substance (m) = 50 g

Volume of substance (V) = 20 cm³

Density of substance (D) = m/v = 50g/20cm³
= 2.5gcm^(-3)

The substance will sink in water, when density {2.5 gcm^(-3)} is more than the density of water
{(1 gcm^(-3)}


(2) DENSITY of sealed pack =
$\frac{mass \: of \: the \: packed}{volume \: of \: packed}$
= 500/350= 10/7 =
$1.428c {m}^{ - 3}$

The density of the substance is more than the density of water (1 g cm-3).

Hence, it sink in water.

As the packet is fully submerged in water,

Mass of water displaced by the packet = (volume of the packet )x (density of water)

= 350 cm3 × 1 g/cm3 = 350 g



I HOPE ITS HELP YOU DEAR,
THANKS

Answer 2

Mass of substance = 50 g

Volume of substance = 20 cm³

Density of substance

= m/v = 50g/20cm³ 

= 2.5gcm^(-3)



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DENSITY of sealed pack =
mass of the packed volume of packed. volume / of packed​​mass of the packed​​ 
= 500/350= 10/7 =
1.428c {m}^{ - 3}1.428cm​−3​​ 




___________



density of the substance is more than the density of water (1 g cm-3). 





THEREFORE,


it sink in water.



Mass of water displaced by the packet = (volume of the packet )x (density of water)

= 350 cm3 × 1 g/cm3 = 350 g






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