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4 years ago

How to put a paper heart together by twinkl

Chemistry

2 answers:

nexus9112 [7]4 years ago

7 0

The answer is: ......................

Anna007 [38]4 years ago

5 0

How to Make a Heart Out of Paper
Looking for simple and easy projects to make hearts from paper? There are many different ways to make hearts out of paper and these can be used for decorations, gifts or ornaments. They are simple to make and great projects for kids as well. By following a few steps you will have a lovely heart made out of paper!

Method One of Four:
Making a Paper Heart Ornament
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Image titled Make a Heart Out of Paper Intro
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Make this paper heart ornament for a quick and simple hanging heart decoration. These heart ornaments are beautiful and only take a few minutes to create, making them ideal for garlands. They consist of strips of paper bent into a heart shape.[1]
Image titled Make a Heart Out of Paper Step 1
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Cut nine strips of paper. Use sturdy paper, like construction paper or patterned scrapbook paper. You will need nine strips in four different lengths, and each strip should be 2 inches (5 cm) wide.
Three strips should be 10 inches (25 cm) long.
Two strips should be 12.5 inches (32 cm) long.
Two strips should be 15.75 inches (40 cm) long.
Two strips should be 19.75 inches (50 cm) long.
Image titled Make a Heart Out of Paper Step 2
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Stack the strips on top of each other in the correct order. The strips need to be piled together in a specific order so that the proper pattern forms in your heart.
Pile four of the strips on top of each other from smallest to largest until you have used one of each size. The largest should be on the bottom with the smallest on top.
Image titled Make a Heart Out of Paper Step 2Bullet1
Flip the pile over so that the largest is on top. Place another of the smallest strips on top of the first 19.75 inch (50 cm) strip. This newest strip will stay at the center and will help you to hang your heart.
Image titled Make a Heart Out of Paper Step 2Bullet2
Pile the remaining strips on top of the others from largest to smallest, until all the strips have been used. This means the largest will go on top of the smallest that you have just placed down with the rest on top. You will end up with the smallest on top once more.
Image titled Make a Heart Out of Paper Step 2Bullet3
Image titled Make a Heart Out of Paper Step 3
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Staple the strips together. Make sure the bottoms of all the strips are evenly lined up with one another. Put a single staple through the bottom to hold the strips together.
Image titled Make a Heart Out of Paper Step 4
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Bend the strips one by one down to the base of the stack of papers. Hold the stack together at the bottom, near your lowest staple, and bend the pieces of paper toward your fingers. Starting with the smallest strip on each side, bend each of the strips down to the staple at the base of the stack of papers.
Bend each of the four strips on the right side starting with the smallest and ending with the longest. Bring them down to the right side of the staple at the base of the stack.
Bend the corresponding four strips on the opposite side down and to the left.
Leave the center strip straight and hold the stack together with thumb and forefinger at the base of the heart.
Image titled Make a Heart Out of Paper Step 4Bullet1
Be careful not to crease the paper as you bend it.
Image titled Make a Heart Out of Paper Step 5
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Staple the base of the heart together. This will keep all the strips in their bent position. Use as many staples as necessary to hold the bent strips of paper in place.
You may also need to add staples further along the stem to help form and maintain the heart shape. These staples might be visible so it is your choice whether to add them to your heart or not.
Image titled Make a Heart Out of Paper Step 5Bullet1
Image titled Make a Heart Out of Paper Step 6
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Punch a hole through the center strip. Use a paper hole puncher to punch a small hole at the top of the straight center strip.
Center the hole and place it roughly 1 inch (2.5 cm) away from the top edge.
Image titled Make a Heart Out of Paper Step 6Bullet1
Image titled Make a Heart Out of Paper Step 7
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Insert twine through the hole. Place a long string, ribbon, piece of yarn, or piece of twine through the hole and tie it into a loop. You can use this loop to hang your heart ornament.
Image titled Make a Heart Out of Paper Step 7Bullet1
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Hang your ornament. Now that your heart is complete you can hang it in a location of your choice. You can also make additional ornaments and connect them into a garland if you wish.

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Triss [41]

Answer:

1. $3.57\times 10^{-4}$ was the $K_a$ value calculated by the student.

2. $5.93\times 10^{-4}$ was the $K_b$ of ethylamine value calculated by the student.

Explanation:

The $pH$ value of Aspirin solution = 2.62

$pH=-\log[H^+]$

$[H^+]=10^{-2.62}=0.00240 M$

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Volume of the solution = 0.600 L

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$HAs\rightleftharpoons As^-+H^+$

initially

c 0 0

At equilibrium

(c-x) x x

The expression of dissociation constant :

$K_a=\frac{[As^-][H^+]}{[HAs]}$ :

$K_a=\frac{x\times x }{(c-x)}$

$=\frac{0.00240 M\times 0.00240 M}{(0.0185-0.00240 )}$

$K_a=3.57\times 10^{-4}$

$3.57\times 10^{-4}$ was the $K_a$ value calculated by the student.

The $pH$ value of ethylamine = 11.87

$pH+pOH=14$

$pOH=14-11.87=2.13$

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$[OH^-]=10^{-2.13}=0.00741 M$

The initial concentration of ethylamine = c = 0.100 M

$C_2H_5NH_2+H_2O\rightleftharpoons C_2H_5NH_3^{+}+OH^-$

initially

c 0 0

At equilibrium

(c-x) x x

The expression of dissociation constant :

$K_b=\frac{[C_2H_5NH_3^{+}][OH^-]}{[C_2H_5NH_2]}$ :

$K_b=\frac{x\times x}{(c-x)}$

$=\frac{0.00741\times 0.00741}{(0.100-0.00741)}$

$K_b=5.93\times 10^{-4}$

$5.93\times 10^{-4}$ was the $K_b$ of ethylamine value calculated by the student.

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3 years ago

AVERAGE WEIGHT OF CHILDREN, AGE 1-5

aalyn [17]

The most weight was gained between 0 - 1 years for both boys and girls.

<h3>What is weight?</h3>

Weight is a vector quantity that varies from place to place to due to effect of gravity.

Average weight of the boys in pounds;

age -------------------- average weight

0 -------------------------50

1 ------------------------- 45

2 ------------------------ 40

3 ------------------------- 35

4 -------------------------- 30

5 -------------------------- 25

Average weight of the girls in pounds;

0 --------------------------------- 20

1 ----------------------------------- 15

2 ------------------------------------ 10

3 --------------------------------------5

4 -------------------------------------- 0

5 --------------------------------------- 1

The most weight was gained between 0 - 1 years for both boys and girls.

Learn more about average weight here: brainly.com/question/24889549

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Katarina [22]

Answer:

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Explanation:

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a. Water molecules have a nonpolar bond.

It is wrong choice because water has polar bond .

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Also, a wrong choice due to water molecule gives a slight negative charge near its oxygen atom.

c. Water molecules have a weakly positive hydrogen end.

This is the right choice.

d. Water molecules have two oxygen and two hydrogen atoms

It is wrong choice because water has one oxygen and two hydrogen atoms

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