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Phy 241
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: ->->->->->->->->->->->-> :
m = 400g
g = 9.81 m/s^2
w = m*g
= .4kg * 9.81m/s^2
= 3.924 N
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What is the buoyant force on the ball?
answer/question/discussion: ->->->->->->->->->->->-> :
Sum of all the forces in the y direction
0 = 3.924 N - 2.5 N + F
F = 1.424 N
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What therefore must be its volume?
answer/question/discussion: ->->->->->->->->->->->-> :
d = 1g/cm^3
F = 1.424 N = m*a
a = 9.81 m/s^2
m = F/a
= 1.424N/ 9.81 m/s^2
= 0.145 kg
For every gram of water is equal to one cm^3
v = 145 m^3
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What is its density?
answer/question/discussion: ->->->->->->->->->->->-> :
d = m/v
v = 145 m^3
m = 0.4 kg
d = 400g / .145 cm^3
= 2758.6 g/cm^3
self-critique #$&*
#$&* self-critique
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&#Very good work. Let me know if you have questions. &#