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3 years ago

How to put a paper heart together by twinkl

Chemistry

2 answers:

nexus9112 [7]3 years ago

7 0

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

Anna007 [38]3 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]
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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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At a pressure of 650 kpa 2.2L of hydrogen is used to fill a balloon to a final pressure of 115 kpa. What's the balloons volume?

Alborosie

Answer:

V₂ = 12.43 L

Explanation:

Given data:

Initial pressure = 650 KPa

Initial volume = 2.2 L

Final pressure = 115 KPa

Final volume = ?

Solution:

The given problem will be solved through the Boyles law,

"The volume of given amount of gas is inversely proportional to its pressure by keeping the temperature and number of moles constant"

Mathematical expression:

P₁V₁ = P₂V₂

P₁ = Initial pressure

V₁ = initial volume

P₂ = final pressure

V₂ = final volume

Now we will put the values in formula,

P₁V₁ = P₂V₂

650 KPa ×2.2 L = 115 KPa × V₂

V₂ = 1430 KPa. L/ 115 KPa

V₂ = 12.43 L

4 0

3 years ago

55 L of a gas at 25oC has its temperature increased to 35oC. What is its new volume?

ladessa [460]

Answer:

Approximately 56.8 liters.

Assumption: this gas is an ideal gas, and this change in temperature is an isobaric process.

Explanation:

Assume that the gas here acts like an ideal gas. Assume that this process is isobaric (in other words, pressure on the gas stays the same.) By Charles's Law, the volume of an ideal gas is proportional to its absolute temperature when its pressure is constant. In other words

$\displaystyle V_2 = V_1\cdot \frac{T_2}{T_1}$ ,

where

$V_2$ is the final volume,
$V_1$ is the initial volume,
$T_2$ is the final temperature in degrees Kelvins.
$T_1$ is the initial temperature in degrees Kelvins.

Convert the temperatures to degrees Kelvins:

$T_1 = \rm 25^{\circ}C = (25 + 273.15)\; K = 298.15\; K$ .

$T_2 = \rm 35^{\circ}C = (35 + 273.15)\; K = 308.15\; K$ .

Apply Charles's Law to find the new volume of this gas:

$\displaystyle V_2 = V_1\cdot \frac{T_2}{T_1} = \rm 55\;L \times \frac{308.15\; K}{298.15\; K} = 56.8\; L$ .

8 0

3 years ago

When dipentyl ether is treated with HI, what type of reaction occurs? both SN1 and SN2 SN2 E1 SN1 E2

masha68 [24]

Answer:

SN2

Explanation:

The first step of ether cleavage is the protonation of the ether since ROH is a better leaving group than RO-.

The second step of the reaction may proceed by either SN1 or SN2 mechanism depending on the structure of the ether. Methyl and primary ethers react with HI by SN2 mechanism while tertiary ethers react with HI by SN1 mechanism. Secondary ethers react with HI by a mixture of both mechanisms.

Dipentyl ether is a primary ether hence when treated with HI, the reaction with HI proceeds by SN2 mechanism as explained above.

7 0

3 years ago

When waves speed up, wave deposition occurs.<br><br> True <br><br> False

Nina [5.8K]

Answer:False

Explanation:

slow down/ meet and obstacle.

4 0

3 years ago

Read 2 more answers

A sample of pure water is neutral because it contains 1. very few hydroxide ions and no hydronium ions. 2. no hydronium ions and

Nimfa-mama [501]

Answer:

Option 5.

Equal amounts of hydroxide and hydronium ions

Explanation:

2H₂O ⇄ H₃O⁺ + OH⁻ Kw: 1×10⁻¹⁴

Neutral solution has pH = 7

So, [H₃O⁺] = [OH⁻]

In solutions of only pure water:

[H₃O⁺] = 1×10⁻⁷ M

[OH⁻] = 1×10⁻⁷ M

Kw = [H₃O⁺] . [OH⁻] → 1×10⁻⁷ . 1×10⁻⁷ = 1×10⁻¹⁴

3 0

3 years ago