INPUT ARTICLE: Article: Position it on a flat surface so you can measure it correctly. Make sure the springs are not being stretched or pulled when you place it down, as this can skew your measurements. Take a ruler or measuring tape and place it on the outside edge of one of the hooks on the spring. Extend it to the outside edge of the other hook on the spring. This will ensure you get a proper measurement. Note where the outside edge of the hook hits the ruler or measuring tape so you get an accurate measurement. Place the ruler or measuring tape against the opening on the spring, next to one of the hooks. It should lay vertically against the spring. Extend the measuring tape to the other end of the opening. Note the diameter of the spring, or how wide the opening is. Confirm your measurement is correct by checking several other springs on the trampoline. Check that the springs are not warped or stretched out when you measure them. The springs on the trampoline should all be the same size. Most trampoline springs range in size from 3.5 to 8.5 inches (8.9 to 21.6cm), depending on the size and shape of the trampoline.

SUMMARY: Place the spring on the ground or on a table. Measure hook to hook with a ruler or measuring tape. Measure the outside diameter of the spring. Measure 2-3 springs to confirm the measurements.

INPUT ARTICLE: Article: You can use sheet metal shears to do this easily. Make the sheets the same size. You want 1 sheet to fit on your burner or hot plate, and both to fit in the 2-liter bottle. Making them both 6in (15cm) squares should work well. Use a degreaser to remove any oils or grease from your copper sheet. You do not want them to react with the copper or to prevent oxidation from happening. You should also wear gloves to avoid getting oil from your skin on the copper. Also be sure to scrub the copper with steel wool or sandpaper to remove any corrosion. Once you have placed a sheet on the hot plate, turn the hot plate on. This will heat the copper and provide the energy needed for the copper to react quickly with the oxygen in the air. This speeds up the natural oxidation process considerably. As the copper heats up you will see varying shades of red, pink, purple, and possibly other colors. This is a sign that oxidation is taking place. Finally, you will notice that these colors are all being replaced by a black covering. This covering is cuprous oxide. Once the whole sheet is covered in cuprous oxide, allow it to cook at least 30 more minutes. Cooking the extra 30 minutes makes the cuprous oxide layer thick and brittle. This allows it to break away from the copper. A thin layer of cuprous oxide would remain on the copper, covering up the cupric oxide layer that needs to be exposed. When you are finished cooking the copper, turn the burner off. Leave the copper on the burner to cool. This allows the copper to cool very slowly to room temperature, which should take about 20 minutes. During the cooling process the copper and the cuprous oxide layer shrink at different rates. As long as the layer is thick enough, this will result in the black cuprous oxide flaking off and exposing the red cupric oxide layer. Note that cupric oxide (Copper (II) oxide) is the fully oxidized form, and cuprous oxide (Cu2O) is still in an active state. You can rinse the sheet under water to remove the remaining black deposits. Cupric oxide is a semiconductor and must be exposed in order to make the solar cell function.

SUMMARY: Cut 2 copper sheets. Clean your copper sheets. Place 1 copper sheet on a hot plate. Allow the copper to oxidize completely. Allow the copper to cool slowly.

INPUT ARTICLE: Article: Prepare a muffin pan with nonstick spray or cupcake cases. Pour in the milk, eggs and maple syrup. Mix to combine. Using a spoon or scoop, fill the muffin holes about two thirds each. Bake for 13 to 15 minutes. The muffins are ready when a toothpick inserted comes out clean. Serve fresh.

SUMMARY: Preheat the oven to 180C/350F. Add the pancake mix to a mixing bowl. Transfer the batter to the muffin pan. Place in the oven. Allow to cool.

INPUT ARTICLE: Article: The Sino-Japanese system uses kanji characters to represent each number. The pronunciations of these characters differ from the pronunciations of the native Japanese characters. Use flashcards or a similar system to memorize these characters and their pronunciations. One (1) is (ichi, pronounced "ee-chee"). Two (2) is (ni, pronounced "nee"). Three (3) is (san, pronounced "sahn"). Four (4) is (shi, pronounced "shee"). Because this word sounds like the Japanese word for death, the alternate pronunciation yon is also used especially when talking about people. Five (5) is (go, pronounced "goh"). Once you've memorized the kanji characters and pronunciations of the numbers from 1 to 5, add the next 5. Practice until they come as smoothly as the first five. Then you are able to count to 10 using the Sino-Japanese system. Six (6) is (roku, pronounced "loh-koo"). Seven (7) is (shichi, pronounced "shee-chee"). Because this has the same shi sound as in the number four, the alternate pronunciation nana is common. Eight (8) is (hachi, pronounced "hah-chee"). Nine (9) is (kyuu, pronounced "kyoo"). Ten (10) is (juu, pronounced "joo"). Once you know how to count to 10, creating larger numbers is a breeze. Unlike in English and other European languages, there are no new words to learn. If you break the number down into its parts and combine the symbols for each of those parts, you can count all the way to 99 with 10 characters. For example, 31 is : three tens and a one. You say it san juu ichi. 54 is : five tens and a four. You say it go juu shi. If you want to refer to the "first" or "second" rather than the cardinal number, put a after the number. Then read the number and the together. For example, means "first." You would read it ichi me (pronounced "ee-chee meh"). You do the same thing with larger numbers. For example, means "thirty-first." However, in most cases you would be talking about the 31st something, such as the 31st time or someone's 31st birthday. To say that, you would need an additional character, known as a counter, that is appropriate for that thing.

SUMMARY:
Memorize the symbols and words for the numbers from 1 to 5. Move on to the symbols and words for the numbers from 6 to 10. Combine symbols to create larger numbers. Add (me, pronounced "meh") to use a number as an ordinal.