apparent mass question.....

[Smooth Operater]

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a regulary shaped object, with a mass of 497 g is weighed in water. If the object had a volume of 184 cm^3, its apparent mass would be:

a. 21.10 g
b. 184 g
c. 313 g
d. 497 g
e. 681 g

the correct answer is C. But how would you arrive to this anwer? What's the definition of apparent mass?? Thanks!

 

[Smooth Operater]

bump

 

[nickatina]

i have no idea what apparent mass is. but logically 184 cc of water will weigh 184 grams so its apparent mass will be 497-184 (ie its apparent mass while floating in the water..

after some searching on wiki "Apparent weight is lessened by buoyancy, which occurs when an object is immersed in a fluid (a liquid or a gas). For example, an object immersed in water weighs less, according to a spring balance, than the same object in air. The apparent weight of a floating object is zero."

so basically its apparent mass is the mass minus the mass of water displaced.

 

[VIV0411]

Apparent Weight =weight Of Water- Upward Thrust

=(mg- Density Of Water Displaced*volume Of Liquid*gravity)

=497*g-1*184*g
=g(497-184)
=497-184
=313g

Or,apparent Mass=313

Hope Its Useful

 

[sajjy]

Physics and DAT???

 

[Streetwolf]

And with his first post he bumps an almost 17 month old thread.