# Density The Amount of Mass in a given Volume To find the density of an object we need it s Mass by rM4xIRHL

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```									         Density

The Amount of Mass in a given
Volume
• To find the density of an object we need
it’s Mass, and it’s Volume. To get the
Mass, we use a Triple Beam Balance.
(there are other sorts, but this is a nice
basic one)
• BTW – it’s a delicate instrument – not a
toy – treat it gently!!!
Triple Beam Balance
• Check it first – put all the sliders to zero,
and see if it measures zero. (the pointer
on the right in the middle of it’s range –
and not moving (or much))

• If it’s not zero –
call me…
• Gently place the object you are testing on
the pan.

• Slide the sliders until you get it balanced.
Try the heaviest one first! Finish up with
the lightest.
• Add up all the values on the sliders
Now for the Volume
• From Math class, you know that Volume of
a right rectangular solid (box) is L x W x H
• So, it’s easy enough – measure them with
a meter stick – write down each
measurement in cm. (Our Density is going
to be in g/cm3)
• If it’s a sphere – 4/3pr3 – so you can
measure the diameter and divide by 2
Do 5 Objects
Object Length Width Height Volume   Mass   Density
(cm)  (cm)   (cm)   (cm3)    (g)   (g/cm3)
Pumice   Mercury

Osmium
Lots of
Salt
High
Density
Disclaimer
Aloha
I put together these power points for use in
my science classes.
You may use them in your classes.

Some images are public domain, some
are used under the fair-use provisions of
the copyright law, some are mine.
Copyright is retained by the owners!
Ted Brattstrom

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