How to use the Init << 1/12/2012 by Daniel R. Barnes WARNING: This presentation may contain graphical items and other intellectual content that was lifted.

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Presentation transcript:

How to use the Init << 1/12/2012 by Daniel R. Barnes WARNING: This presentation may contain graphical items and other intellectual content that was lifted from the world wide web without the permission of the owners. Do not copy or distribute this presentation. Its very existence may be illegal.

SWBAT zero, adjust, and read the triple beam balance.

triple beam balanceThemeasuresmass.

Put the balance on alevelsurface. Slide all the masses to If the two white lines don’t touch, Rotate the screw under the pan until the white lines do line up. zero.

Once the scale is properly “zeroed”, put the object to be massed on the pan. (in this case, a delightful little hamster.) Okay. We’re ready to start moving the sliders, so let’s zoom in on them

Once the big mass is on the correct notch, don’t ever move it again. If the pan goes up, you need to move the slider backward one notch and leave it there. Move the masses one at a time, starting with the biggest one.

Repeat the procedure with the medium mass. If putting the medium mass on 70 makes the pan go up slide it back to 60 and leave it there.

Notice that the large and medium masses have notches on their rails.

This reminds us that we should never leave the large mass or the medium mass between numbers. We must “click” the large and medium masses right onto the numbers.

Finally, slide the little mass on the front rail until the two white lines match up. Because there are no notches on the front rail, you can slide it to the exact position you want.

Usually, the little pointer on the small slider won’t point exactly to a line. For instance, the slider here is about halfway between 1.5 and 1.6. In such a case, you are allowed to estimate a hundredths digit. Since it’s exactly half-way this time, you could call this one

This time, the little slider reads or so. Can you see how the pointer is just a little bit past the 4.7? Maybe you think it’s closer to 4.72 than it is to This is where the measuring process loses some of its precision.

This time, the little slider reads about Can you see how the pointer is almost to the 3.4 but not quite?

This time, the little slider reads about This time, the pointer is about halfway between the 8.2 and the 8.3 marks, but it’s just a bit closer to the 8.2.

And now... some scale-reading practice.

Triple Beam Balance Demonstrator by Daniel R. Barnes, init 9/18/2006 Ok. I get it. That’s enough practice reading the numbers grams

Triple Beam Balance Demonstrator by Daniel R. Barnes, init 9/18/2006 Ok. I get it. That’s enough practice reading the numbers grams

Triple Beam Balance Demonstrator by Daniel R. Barnes, init 9/18/2006 Ok. I get it. That’s enough practice reading the numbers grams

Triple Beam Balance Demonstrator by Daniel R. Barnes, init 9/18/2006 Ok. I get it. That’s enough practice reading the numbers grams

Triple Beam Balance Demonstrator by Daniel R. Barnes, init 9/18/2006 Ok. I get it. That’s enough practice reading the numbers grams

Triple Beam Balance Demonstrator by Daniel R. Barnes, init 9/18/2006 Ok. I get it. That’s enough practice reading the numbers grams

Triple Beam Balance Demonstrator by Daniel R. Barnes, init 9/18/2006 Ok. I get it. That’s enough practice reading the numbers. 8.9 grams

Triple Beam Balance Demonstrator by Daniel R. Barnes, init 9/18/2006 Ok. I get it. That’s enough practice reading the numbers grams

Triple Beam Balance Demonstrator by Daniel R. Barnes, init 9/18/2006 Ok. I get it. That’s enough practice reading the numbers grams

Triple Beam Balance Demonstrator by Daniel R. Barnes, init 9/18/2006 Ok. I get it. That’s enough practice reading the numbers grams

Triple Beam Balance Demonstrator by Daniel R. Barnes, init 9/18/2006 Ok. I get it. That’s enough practice reading the numbers grams

Triple Beam Balance Demonstrator by Daniel R. Barnes, init 9/18/2006 Ok. I get it. That’s enough practice reading the numbers grams

Triple Beam Balance Demonstrator by Daniel R. Barnes, init 9/18/2006 Ok. I get it. That’s enough practice reading the numbers grams

Triple Beam Balance Demonstrator by Daniel R. Barnes, init 9/18/2006 Ok. I get it. That’s enough practice reading the numbers grams

Triple Beam Balance Demonstrator by Daniel R. Barnes, init 9/18/2006 Ok. I get it. That’s enough practice reading the numbers grams

Triple Beam Balance Demonstrator by Daniel R. Barnes, init 9/18/2006 Ok. I get it. That’s enough practice reading the numbers grams

Triple Beam Balance Demonstrator by Daniel R. Barnes, init 9/18/2006 Ok. I get it. That’s enough practice reading the numbers grams

Triple Beam Balance Demonstrator by Daniel R. Barnes, init 9/18/2006 Ok. I get it. That’s enough practice reading the numbers grams

Triple Beam Balance Demonstrator by Daniel R. Barnes, init 9/18/2006 Ok. I get it. That’s enough practice reading the numbers grams

Triple Beam Balance Demonstrator by Daniel R. Barnes, init 9/18/2006 Ok. I get it. That’s enough practice reading the numbers. 5.0 grams

Triple Beam Balance Demonstrator by Daniel R. Barnes, init 9/18/2006 Ok. I get it. That’s enough practice reading the numbers grams

Triple Beam Balance Demonstrator by Daniel R. Barnes, init 9/18/2006 Ok. I get it. That’s enough practice reading the numbers grams

Triple Beam Balance Demonstrator by Daniel R. Barnes, init 9/18/2006 Ok. I get it. That’s enough practice reading the numbers grams

Triple Beam Balance Demonstrator by Daniel R. Barnes, init 9/18/2006 Ok. I get it. That’s enough practice reading the numbers grams

Triple Beam Balance Demonstrator by Daniel R. Barnes, init 9/18/2006 Ok. I get it. That’s enough practice reading the numbers grams

Triple Beam Balance Demonstrator by Daniel R. Barnes, init 9/18/2006 Ok. I get it. That’s enough practice reading the numbers grams

Triple Beam Balance Demonstrator by Daniel R. Barnes, init 9/18/2006 Ok. I get it. That’s enough practice reading the numbers grams

Triple Beam Balance Demonstrator by Daniel R. Barnes, init 9/18/2006 Ok. I get it. That’s enough practice reading the numbers grams

Triple Beam Balance Demonstrator by Daniel R. Barnes, init 9/18/2006 Ok. I get it. That’s enough practice reading the numbers grams

Triple Beam Balance Demonstrator by Daniel R. Barnes, init 9/18/2006 Ok. I get it. That’s enough practice reading the numbers grams

Triple Beam Balance Demonstrator by Daniel R. Barnes, init 9/18/2006 Ok. I get it. That’s enough practice reading the numbers grams

Triple Beam Balance Demonstrator by Daniel R. Barnes, init 9/18/2006 Ok. I get it. That’s enough practice reading the numbers grams

Triple Beam Balance Demonstrator by Daniel R. Barnes, init 9/18/2006 Ok. I get it. That’s enough practice reading the numbers grams

Triple Beam Balance Demonstrator by Daniel R. Barnes, init 9/18/2006 Ok. I get it. That’s enough practice reading the numbers grams

Triple Beam Balance Demonstrator by Daniel R. Barnes, init 9/18/2006 Ok. I get it. That’s enough practice reading the numbers grams

Triple Beam Balance Demonstrator by Daniel R. Barnes, init 9/18/2006 Ok. I get it. That’s enough practice reading the numbers grams

Triple Beam Balance Demonstrator by Daniel R. Barnes, init 9/18/2006 Ok. I get it. That’s enough practice reading the numbers grams

Triple Beam Balance Demonstrator by Daniel R. Barnes, init 9/18/2006 Ok. I get it. That’s enough practice reading the numbers grams

Triple Beam Balance Demonstrator by Daniel R. Barnes, init 9/18/2006 Ok. I get it. That’s enough practice reading the numbers grams

Triple Beam Balance Demonstrator by Daniel R. Barnes, init 9/18/2006 Ok. I get it. That’s enough practice reading the numbers grams

If there’s still time, either you or your partner should get a triple beam balance. HANDS–ON PRACTICE Once you’ve gotten it, partner A should try to measure the mass of a pencil or a pen. Now, partner B should measure the mass of a piece of paper. Partner A should now measure the mass of his/her house keys. Partner B should now measure the mass of his/her student ID card.