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.
            How to Read it!
• 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
Dead Sea
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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