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nignag [31]
3 years ago
6

In what century was plastic invented ?​

Computers and Technology
2 answers:
nadya68 [22]3 years ago
3 0

Answer:

Explanation:

XIX°

1862 : the  Parkésine  (Alexander Parkes )

liubo4ka [24]3 years ago
3 0

Answer: 19th century

Explanation:

Plastic was invented by Alexander Parkes in Birmingham, England, with the name "Parkesin", a mixture of nitrocellulose, camphor and alcohol. At that time, rubber was used for materials to be shaped with molds instead of plastic. Parkes showed his invention to the world in 1862 at the Great International Fair. His invention won a bronze medal. Due to the high cost of rubber, Alexander Parkes' invention attracted great attention.

Possibly the largest number of different polymeric materials come under the plastic  classification. Plastics are materials that have some structural rigidity under load,  and are used in general-purpose applications.Polyethylene, polypropylene, poly(vinyl  chloride), polystyrene, and the fluorocarbons, epoxies, phenolics, and polyesters may  all be classified as plastics. They have a wide variety of combinations of properties.

Some plastics are very rigid and brittle (Figure 15.1, curve A). Others are flexible,  exhibiting both elastic and plastic deformations when stressed, and sometimes experiencing considerable deformation before fractureThere are many different polymeric materials that are familiar to us and find a wide  variety of applications; in fact, one way of classifying them is according to their enduse.

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Natasha2012 [34]

Answer:

True

Explanation:

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3 years ago
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Which extensions can help drive installs of your mobile app?
Iteru [2.4K]

The question above has multiple choices as follows.

<span>a.       </span>App extensions 

<span>b.      </span>Sitelink extensions

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Tomtit [17]
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4 years ago
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A 4-bit left shift register is initially in the 0000 state, with all the flip flops storing 0s. A group of bits 1011 is serially
frutty [35]

Answer:

0010

Explanation:

Serially left shifted means that the left most bit will enter the register first. The left most bit already stored in the register will move out of the sequence. The "bold" bits mentioned below highlight these left most bits:

Initial State of the Register:

0000

Group of bits entering:

1011

<u>First Clock Cycle:</u>

0000 <em>(This bold bit will move out)</em>

1011 <em>(This bold bit will move in from right side, shifting the whole sequence one place to the left).</em>

The resulting Sequence:

0001

<u>Second Clock Cycle:</u>

0001 <em>(This bold bit will move out)</em>

1011 <em>(This bold bit will move in from right side, shifting the whole sequence one place to the left).</em>

The resulting Sequence:

0010 <em>(Final Answer)</em>

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4 years ago
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