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Phy 201
Your 'cq_1_27.1' report has been received. Scroll down through the document to see any comments I might have inserted, and my final comment at the end.
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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: ->->->->->->->->->->->-> :
weight = .4kg * 9.8 m/s/s = 3.92 N
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• What is the buoyant force on the ball?
answer/question/discussion: ->->->->->->->->->->->-> :
equilibrium= 0
-3.92 N + 2.5 N + (x * 9.8) = 0
x * 9.8 = 1.42
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• What therefore must be its volume?
answer/question/discussion: ->->->->->->->->->->->-> :
volume = 1.42 / 9.8 = .1448 cm3
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@& You aren't using units, and as a result your answer is not in correct units.
.1448 cm^3 of displaced water does not have a weight of 1.42 N.
The sequence of your reasoning is fine; it's just the units that are missing and/or in error.*@
• What is its density?
answer/question/discussion: ->->->->->->->->->->->-> :
density of h20 = 1 g per cm3
d = 144.8
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@& 'it' refers to the ball, not to water.*@
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