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shepuryov [24]
3 years ago
11

25 POINTS PLS ANSWER

Physics
1 answer:
Olegator [25]3 years ago
4 0

Answer:

A

Explanation:

a statement that can be used to predict the motions of two objects only under special conditions

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What are the factor that affect gravity​
valentinak56 [21]

Explanation:

The factors that affect gravity are as follows:

1. mass of body

2. acceleration

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6 0
3 years ago
Hi
Vera_Pavlovna [14]

1) the cotton bolls burst open, and the white cotton fiber can be seen. Ginning: The cotton picked up from the plants has seeds in it. The process of removing cotton seeds from pods is called ginning. Ginning was traditionally done by hand.

2) Preparation

To be used for thread or fabric, raw seed cotton must cleaned and free of debris. Seeds, burrs, dirt, stems and leaf material are removed from the cotton during ginning.

Module feeders break the modules apart and feed the cotton into the gin.

Some module feeders have giant conveyors moving the modules into stationary heads.

Other module feeders are self-propelled, moving down a track alongside the modules.

Once in the cotton gin, the seed cotton moves through dryers and through multiple cleaning machines that remove the gin waste such as burrs, dirt, stems and leaf material from the cotton. Once thoroughly clean and dry, the cotton goes to the gin stand where circular saws with small, sharp teeth pluck the fiber from the seed. This process makes the sliver smoother so more uniform yarns can be produced. Then the cotton is packed tightly into bales, ready to be processed into textiles.

Even though the cotton is cleaned during the ginning process, it's not nearly as clean as  it needs to be. Cotton fibers are shaved from the bales and sent through a series of cleaning and drying machines. The mixed and fluffed-up cotton goes into a carding machine which finishes the cleaning and straightening of the fibers, making them into a soft, untwisted rope called a sliver (pronounced sly-ver).

The sliver is drawn out to a thinner strand and given a slight twist to improve strength, then wound on bobbins (spools wound with the thread-like product for storage).  

It is now called roving and the roving bobbins are now ready for the spinning process.

Spinning

On modern spinning frames, yarn is mare directly from the sliver. The spinning devices take fibers from the sliver and rotate it up to 2,500 revolutions in a second twist that makes fibers into a yarn for weaving or knitting into fabrics.

Spinning is the last process in yarn manufacturing. Today's mills draw and twist the roving into yarn and place it on bobbins. They do this quite efficiently. A large, modern mill can produce enough yarn or thread in 30 days to wrap around the earth 2300 times or go to and return from the moon 235 times. With the use of automatic winding, the yarn bobbins are transferred to larger bobbins called cheese cones. These cheese cones can be stored until they are needed in the weaving process.

Weaving

Looms weave cotton yarns into fabrics the same way the first hand-weaving frames did. Modern looms work at great speeds, interlacing the length-wise yarns (warp) and the crosswise yarns (weft).

Warp refers to yarns that run lengthwise in woven goods. In preparation of warp yarns for weaving, hundreds of yarn strands are wound from cheese cones onto a large warp beam. Yarns on this beam are then coated with a starch mixture (sizing compound) to add strength for weaving.

Weft is the yarn that runs crosswise in woven goods and may be referred to as filling yarn. Sizing is not placed on weft because flexibility is needed in the weaving process.

In today's most modern mills, the weft is fed into the loom from cheese cones with air-jets at such a high speed that its movement cannot be seen.

The woven fabric, called gray goods, is sent to a finishing plant where it is bleached, pre-shrunk, dyed, printed and given a special finish before being made into clothing or products for the home. Other machines make knits for use in shirts, sweaters or blankets.

this website will help you: https://www.quilting-in-america.com/process-of-making-cotton.html

i hope this helps :)

6 0
3 years ago
A 30 kg rock sits motionless on the ground. What is the normal force on the rock?
Anna [14]

Answer:30 kg

Explanation:

5 0
3 years ago
A self-sustaining reaction that creates an on-going series of reactions
ziro4ka [17]

It's chain reaction.

3 0
3 years ago
Read 2 more answers
A 1200 kg car moving at 5.8 m/s is initially traveling north in the positive y direction. After completing a 90° right-hand turn
Keith_Richards [23]

Answer

given,

mass of car = 1200 Kg

initial velocity in north = 5.8 m/s

90° right-hand turn in time = 3.3 s

car stop in, time = 270 ms

a) impulse = change in momentum

  Initial momentum = ( m x v) j

                                = ( 5.8 x 1200 ) j

                                = ( 6960) j

  final momentum after turn is 90°

                 = 6960 i

impulse  = 6960 i - 6960 j

impulse = 6960 ( i - j )

b) due to collision

initial momentum after turning = 6960 i

final momentum is equal to zero

   impulse = 0 - 6960 i

   impulse = - 6960 i

c) during turn

       I = F Δ t

       F = \dfrac{I}{t}

       F = \dfrac{6960 ( \hat{i} -\hat{j})}{3.3}

       F =2109.1 ( \hat{i} -\hat{j})

magnitude of force

       F =2109.1\sqrt{2}

       F =2982.72\ N

d) during collision

       F = \dfrac{I}{t}

       F = \dfrac{-6960 \hat{i} }{0.27}

       F =-25777.78\hat{i}\ N

magnitude of average force is equal to

       F =25777.78\ N

e) angle between average force

       F =2109.1 ( \hat{i} -\hat{j})

        \theta =tan^{-1}(\dfrac{-1}{1})

        \theta =-45^0

4 0
3 years ago
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