cq_1_271

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PHY 201

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A ball of mass 400 grams is immersed in water. The ball is suspended in the water by a rubber band chain which exerts a tension force of 2.5 Newtons on the ball.

• What is the weight of the ball?

answer/question/discussion: ->->->->->->->->->->->-> :

The weight of the ball is .4 kg * 9.8 m/s^2 = -3.92 N.

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• What is the buoyant force on the ball?

answer/question/discussion: ->->->->->->->->->->->-> :

The buoyant force on the ball is the weight of the volume of the ball: 1 g per cm^3, multiplied by the acceleration of gravity: .4 g * 9.8 m/s^2 = 3.92 N.

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• What therefore must be its volume?

answer/question/discussion: ->->->->->->->->->->->-> :

400 cm^3

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• What is its density?

answer/question/discussion: ->->->->->->->->->->->-> :

Density = mass/volume = 400 g / 400 cm^3 = 1 g * cm^3

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20 Minutes

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