Chronology | Current Month | Current Thread | Current Date |
[Year List] [Month List (current year)] | [Date Index] [Thread Index] | [Thread Prev] [Thread Next] | [Date Prev] [Date Next] |
-----Original Message-----water equals
From: Forum for Physics Educators [mailto:PHYS-
L@list1.ucc.nau.edu] On Behalf Of Anthony Lapinski
Sent: Tuesday, February 01, 2005 10:53 AM
To: PHYS-L@LISTS.NAU.EDU
Subject: buoyancy
Objects float in water because the weight of the displaced
the object's weight. I put a beaker of water on a scale and askmy
students what will happen to the reading if I dip my hand in.Most say it
will stay the same, but are surprised to find the readingactually
increases -- by the weight of displaced water my finger pushesaway. I
askchange? Yes -
if a live fish were placed in the water, would the reading
-fish dies
by the weight of displaced water once again. But what if the
andreflect
goes to the bottom of the beaker? The scale reading should
this.the weight
It should increase by the actual weight of the fish. But does
of displaced water matter?