Pls answer these questions fast.

Solution :

Given mass, m = 1 kg
We know that,
Acceleration due to gravity (g) on earth = 9.8 m/s2
Weight in Newton = m × g
w = 1 × 9.8
w = 9.8 N

2.) This principle is given by Archimedes and known as Archimedes principle.
Which states that when a body is immersed wholly or partially in a liquid, it experiences an upward buoyant force of magnitude equal to the weight of the liquid displaced by it. 
Buoyant force = Weight of displaced liquid 

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