Ezekiel 45:10 Ye shall have just balances, and a just ephah, and a just bath. Ezekiel 45:11 The ephah and the bath shall be of one measure, that the bath may contain the tenth part of an homer, and the ephah the tenth part of an homer: the measure thereof shall be after the homer.

Lab # 6

How to make a Graduate Cylinder.

Preparation ahead of time:

Obtain a discarded glass container or the following description; The one used here has the initials Mc. glass spice container, Net wt 1.75 oz. If you do not use spices, fined a neighbor or relative that does use spices, and has discarded containers. Or find an equivalent container, a small cylindrical container, that will hold approximately 100 millimeters, the Mc. spice container is about 1 and 1/4 inch opening and about 4 and 1/4 inches long.
Used here ( Mc. ) Spice Glass container
Net wt 1.75 grams *

**NOTE: All spices are Irradiated, to my knowledge, but they do not have to Irradiated symbol label.

How to remove paper on spice container bottle:

Fill empty spice container with water and submerge in a larger container, ( a discarded plastic gallon container would do fine ) filled with water. Let stand over night, remove the spice container and using a butter knife, scrape off the label. There will be streaks of paper and glue remaining. Fill spice container and replace into larger container and soak again over night. Now, remove and finish scrapping off the remaining paper and glue.

OBJECT:

How to calibrate a glass or see through plastic container, into 5, 10, 50, 60, 70, 75, 80, 85, 90, 95 and 100 millimeter increments .

MATERIALS:

SBB, One discarded glass or plastic container, preferable 1 and 1/4 inches wide, ( free of any labels ) , Eye dropper, A plastic cup to hold the water ( Make sure that you use cold tap water the colder the better ). A set of standard pennies , Plastic see through tape, if you do not have a permanent fine tip magic marker .

PROCEDURE: & OBSERVATION:

1. Make sure that your cups are dry and clean and you have zero Balanced the SBB, and your spice container should also be dry and clean.

2. Now, place a piece of see through tape along the side of the container, ( such that you can make marks with a ball point pen on it ). If you have a very " fine point magic marker " you may omit the tape. Weigh the spice container. You should use your First Class Lever " Lab # 2 " to get the rough weight, then weigh the spice container and get the exact weight and with a felt tip magic marker ( permanent ) write the weight on the spice container.

3. Your spice container should be in the left cup, and when you have its exact weight, place TWO pennies into the right cup, one full eye dropper would be about one gram, so add three more full eye droppers, now for your fifth eye dropper, do that, a drop at a time, until you are balanced. And just a reminder, like you did the zero balance, by giving the SBB a gentle tap and observing that the pointer goes just as far to one side of the Plumb line as it does to the other side. You have to be sure, so repeat the weighing at least three times, before you are convinced that it is balanced. Once, you have it balanced, remove the spice container, place it on the table, and you have to stoop down next to the table, so that your eye ball is at the same level as the water level in the spice container. Now where to put that mark ? Water has a tendency to adhere to the glass and most plastic containers, so that there is curve that the water produces. This curve is called the MENISCUS ! and that is where you should make you 1/4 to 1/2 inch mark. See diagram below!

4. Now, be SURE to be neat and clean, using a paper towel make sure that the spice container is clean and dry on the out side, and that there are no drops inside the weighing cup. Replace your spice container back into the left side cup of the SBB, and repeat what you have just done, by adding TWO more Standard pennies, which will make it now 10 grams on the right side, and try adding water as you did before to balance it. And don't forget to triple check your final answer. When balanced, remove the ( we will call it the graduate cylinder G C ) instead of the spice container. And as you did previously, make your mark for the 10 millimeter position, be sure to follow the direction about the MENISCUS.

5. You now know or have an idea of how much 10 millimeters, looks like. Place four more pennies into the right side cup, and try to get it balanced, by adding the water into the G C so that you can make the 20 millimeter mark ! You can approximate the amount and finish it off with the eye dropper. You may want to make a spout from the plastic cut by creasing the edge, so it makes a spout, when pouring the water into the G C, be sure to remove it out of the cup, and make sure that the G C is clean and dry. If you over shoot the volume, you can use the eye dropper for removing some water out of the G C, if the eye dropper does not reach the water, you may have to slightly tilt the G C, so that you can reach the water.

6. Finish the rest of the markings, up to 100 millimeters.

7. You now have a Graduate Cylinder, with the following markings; 5, 10, 20, 50, 60, 70, 75, 80, 85, 90, 95 and 100 ml.

QUESTIONS:

1. What are the units for volume ? 2. How much does one millimeter weigh ?

3. Explain why it is possible to use a sensitive balance to measure millimeters ?

4. If one centimeter cube of water weighs one gram, how many grams would a two centimeter cube weigh ?

5. How much would 10 centimeter cube of water weigh ?

6. Find out how much a " bath in Ezekiel 45:10 " would be in our measurements ?

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