On the earth, any mass of 5 kg weighs 49 newtons(11 pounds).
On the moon, the same mass weighs 8 newtons (1.8 pounds).
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That depends on the volume of the brick. Whatever its volume is, its weight underwater is(weight of the brick in air) minus (weight of an equal volume of water)
The weight of the displaced water is 2/3 the weight of the brick. So the weight of the brick is 3/2 the weight of an equal volume of water ... just another way of saying that the density of the brick is 1.5 gm/cm3.
A brick weighs one kilogramme plus half-a-brick. What is its weight?
8 pounds
it will most like'll be 3.639kg