Homework Help: physics - density

Posted by Anonymous on Thursday, November 13, 2008 at 2:02am.

A person got a metal rock, he knows this rock density is ρm, but he is worried that there might be a hole within the rock, how he found there is a hole or not? And how he found the fraction of the hole size to total rock size? write your experimental steps.

physics - density - drwls, Thursday, November 13, 2008 at 2:15am
If 闓 is the density of the rock with no holes, it can be compared to the actual density of the sample. Measure the volume of the rock, V and its mass, M.

V*闓 - M = missing mass due to hole(s)
= m

m/闓 = v = volume of hole(s)
v/V = fraction of sample that is holes
= (1/V)[m/闓]
= (1/V)(V*闓 - M)/闓
= 1 - [M/(V*闓)]
physics - density - alexa, Saturday, October 17, 2009 at 5:07pm
how do fish use density in their lives?
physics - density - alexa, Saturday, October 17, 2009 at 5:07pm
how do fish use density in their lives?

Answer this Question

Related Questions

Science - find the density of the two rocks. The jagged rock has a mass of 56 ...
earth - #40 which type of rock is a result of a rock changing by heat and ...
physics - A large rock that weighs 164.0 N is suspended from the lower end of a ...
Chemistry - A rock has a mass of 127 g and displaces 32.1 mL of water. What is ...
physics - A gold prospector finds a solid rock that is composed solely of quartz...
Physics - A gold prospector finds a solid rock that is composed solely of quartz...
Interesting Geometry Probem - I am bulding a sculpture out of rock and need help...
physics - A prospector finds a solid rock composed of granite ( = 2650 kg/m3) ...
oceanography - What is the relative density of seawater. granite rock. basaltic ...
EARTH science - A 100-gram rock has a volume of 35 cubic centimeters. Find the ...

For Further Reading

First Name:
School Subject:
Answer: