An iron ball has an air space unit,the ball weighs 1kg in air and 0.6kg in water.Find the volume of air space.Density of iron is 7200kg/m^3?
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Let w1 & w2 be the weights in air & space , let m1 & m2 be the masses in air & space ,
⇒ W1 = m1g
⇒ 1 = m1 × 9.8
⇒ m1 = 1/9.8 = 0.102 kg
Similarly calculating m2
⇒ m2 = w2/g = 0.6 / 9.8 = 0.061 kg
Total mass of ball in air-space = 0.102 + 0.061 = 0.163 kg
⇒ Now , D = m/V
⇒ V = m/D = 0.163 / 7200 = 0.00002267 m³
⇒ W1 = m1g
⇒ 1 = m1 × 9.8
⇒ m1 = 1/9.8 = 0.102 kg
Similarly calculating m2
⇒ m2 = w2/g = 0.6 / 9.8 = 0.061 kg
Total mass of ball in air-space = 0.102 + 0.061 = 0.163 kg
⇒ Now , D = m/V
⇒ V = m/D = 0.163 / 7200 = 0.00002267 m³
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