Answer :
The mass of the grain of salt is 25 times greater than the mass of the grain of sand.
What is mass?
Mass is the measure of the amount of matter an object contains. It is an important physical property of matter and is typically expressed in kilograms (kg). Mass is different from weight, which is a measure of the force of gravity on an object. Mass is usually determined through the use of balances, scales, or another measurement device. Mass is an important concept in physics, and it is the basis for the definition of inertia, which is the resistance of an object to changes in its motion. Mass is also related to energy, since the same amount of energy is required to accelerate a given mass. Mass is also related to momentum, which is the product of an object's mass and velocity.
The mass of the grain of salt is 25 times greater than the mass of the grain of sand. To calculate this, we can divide the mass of the grain of salt (6.5 × 10–2 gram) by the mass of the grain of sand (2.6 × 10–3 gram):
6.5 × 10–2 ÷ 2.6 × 10–3 = 25
Therefore, the mass of the grain of salt is 25 times greater than the mass of the grain of sand.
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