Question

Question 22 The volume of a 500 g sealed packet is 350 cm 3 . Will the packet float or sink in water if the density of water is 1 g cm −3 ? What will be the mass of the water displaced by this packet?

Class 9 - Science - Gravitation Page 145

Answer 1

The packet will sink because,
If the density of the object is more than density of water, the object will sink
Density of Packet = mass/volume
=500/350 = 1.42

Volume of object immersed = Volume of water displaced
Mass of the water displaced by the packet= Volume of water displaced*Density of water
Mass = 350*1 =350g
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Answer 2

_/\_Hello mate__here is your answer--

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⭐ CONCEPT:-- If the density of an object is more than the density of a liquid, then it sinks in the liquid. On the other hand, if the density of an object is less than the density of a liquid, then it floats on the surface of the liquid.

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Mass of packet, M = 500 g

Volume of packet,V = 350g/cm^3

Dencity of sealed packet =M/V

= 500 /350

= 1.428 g/cm^3

The density of the substance is more than the density of water (1 g/cm3). Hence, it will sink in water.

The mass of water displaced by the packet is equal to the volume of the packet, i.e., 350 g.

I hope, this will help you.☺

Thank you______❤

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