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A curling iron uses heat to temporarily break the hydrogen bonds in the hair, allowing it to be reshaped into a curl. When the hair cools down, the hydrogen bonds reform in the new shape, setting the curl. The size of the curling iron barrel determines the size of the curl.
Curling Straight hair can be easy but it depends on the tools you use to do so, using curling tongs are easy if it has the metal panel flattening the hair to the hot circular band . but if you use irons you can not guarantee to get perfect curls because with irons you have to flatten the hair in-between the ironing panels and turn the iron up from you and pull down but as you do that you will have to twist your hair around the irons and pull but if you find yourself tugging at your hair you twisted it to tight so you will have to uncurl your hair from it a little and continue with this process and with this technique you will find you will have great loose curls or tight curls or it just didn't work (if you keep practising you will be happy with your result). when curing your hair with the curling tongs you will have to wrap a piece of your hair around and hold their (unless you have a metal panel to hold your hair down to the hot curling panel) and when you finally release your hair from the curling tongs you will find you have tight curls or loose curls or curls that went wrong. this process can be used on curly hair also (if you want to neaten your hair up).
Thermal energy is needed in curling irons to heat up the hair strands, making them malleable and easier to shape into curls. The heat from the curling iron helps to break down the hydrogen bonds in the hair, allowing it to temporarily change its structure and hold the curl shape.
Hair dryers, straighteners, and curling irons are a few of the appliances you will need. You may be able to get by with a handheld blow dryer, but if you get many clients you will need the sit-down hair dryers.
There were two kinds of cannonballs. First there were the solid metal cannonballs that were use to break fortifications, buildings and ships. There were also hollow cannonballs that were filled with gunpowder and after the fuse burned down would explode, these were used against troops and ammunition stores.
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Oliver Cromwell melted down most of the Crown Jewels of his time after the establishment of the Commonwealth in 1649.
One reactor at the Chernobyl nuclear power plant melted down in the 1986 disaster.
Friction can slow down the rock
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