How to measure the density of rice grain with density bottle

1. Measure the mass of rice grain m with balance
2. Fill the bottle with water and weigh the total mass M1
3. Put the rice into the bottle, cover it, dry the water on the outer wall of the bottle, and weigh the total mass m2
4. Calculation: m row = (M + m1-m2), V row = m + m1-m2 / P water, P meter = m / v = m / V row = MP water / M + m1-m2

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