Answer :
The number of grains in a 453.6 g (1lb.) bag of rice is equal to 157 grains of rice.
What is weight?
The weight can be described as the force acting due to gravity. Weight can be considered as a vector quantity if the gravitational pull is acting on the body.
Therefore, in free fall, the weight of the object would be zero. Therefore, terrestrial objects can be weightless while ignoring air resistance.
The unit for measurement of weight is the same as of force, which is the newton. A body with a mass of 1 kilogram will exhibit a weight of about 9.8 Newton on the surface of the Earth, and about 1/6th as much weight on the Moon.
Given the weight of the 20 grains = 58 g
The weight of one grain = 58/20 = 2.9 g
The number of grains (n) of rice in weight 453.6 g of the bag of rice can be calculated as:
n = 453.6/2.9
n = 156.4 ≈ 157
Therefore, the number of grains can be considered equal to 157 grains of rice.
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