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QuestionI need to find the density of an object. I know the volume and weight of the object but not the mass. Method 1 uses a scale: does that mean weight and mass are equal? Please clarify this relationship.DonaganTop AnswererFor practical purposes, weight and mass are the same thing. Mass is the amount of matter in an object. Mass does not depend on the object's location. Weight, on the other hand, is the measurement of gravitational pull on an object and can change with location.
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Question3 apples have a mean mass of 100 grams. The largest apple is removed, the mean mass of 2 remaining is 70 g. What is the mass of the largest apple?DonaganTop AnswererThe three apples weigh a total of 300 g (3 x 100). The two apples weigh a total of 140 g (2 x 70). Therefore, the largest apple weighs 160 g (300 - 140).
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QuestionHow do I calculate a mass of a stone?DonaganTop AnswererIf you know the volume and density, use Method 2 above. Otherwise, you'll have to weigh it.
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QuestionHow do I calculate the mass of an object when I am given only the radius?DonaganTop AnswererYou don't have enough information to find the mass.
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QuestionIf 20 kg represents 80% of the mass of an object, how would I find the mass?DonaganTop AnswererDivide 20 by .8.
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QuestionHow do I tell that I now have the dry mass of an object?DonaganTop AnswererDry off the object. If it's too irregular to dry it easily, heat it until all moisture has evaporated.
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QuestionHow do I calculate the mass of an object when I've only been given its acceleration due to gravity?DonaganTop AnswererYou can't do it. In a vacuum, all masses accelerate at the same rate (and would hit the ground simultaneously if dropped from the same height at the same time).
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