Please solve this fast pleasee i will make u the brainliest I – FILL IN THE BLANKS:-
1. plastics can be melted by heating and thereafter moulded into desired
shape.
2. Melamine and Bakelite are examples of.
3. absorbs sweat.
4. are used for making toothbrush bristles.
5. type of plastic is used for making grocery bags.
6. type of plastic is used for making microwave cooking containers.
7. fibres are obtained from plant and animals.
8. Synthetic fibres are acquired from products.
9. Polythene is the polymer of .
10. was the first artificially manufactured fibre.
11. Polyesters are extremely and .
12. is used as an alternative for expensive, warm cashmere clothes.
13. The polymer cellulose is made up of a large number of units.
14. Silk fibre is obtained from whereas artificial silk is obtained by chemical
treatment of
15. Polythene which is used to make polythene bags is an example of a .
16. Plastics do not react with and .
17. Plastics are generally - than metals.
18. is a special plastic on which oil and water do not stick.
19. We should always remember the 5R principle: , , ,

first let us lay out the formula for potential

and kinetic energy:

pe = mgh

ke = (mv^2)/2

where: m=mass, v=velocity, g=gravitational

acceleration, h=height

calculating for mass using the known values of

pe:

340j = m (9.81 m/s^2) (50ft) (1m/3.28ft)

m = 2.27 kg

the law of conservation of energy states that

energy is neither created nor destroyed. therefore, the change in kinetic

energy from 50 ft to 35 ft would be equal to the change in potential energy

from 50 ft to 35 ft. however it would be opposite in signs since one is losing

while other is gaining.

ke(35ft) – ke(50ft) = - [ pe(35ft) – pe(50ft]

ke(50ft) = 0 since the brick is initially at rest

ke(35ft) = 340j - 2.27kg (9.81 m/s^2) (35ft)

(1m/3.28 ft)

ke(35ft)

= 102.38 j

when [oh-] is 10-5  m, and [h3o+] is 10-9  m, the poh is 5 and ph is 9. again in both cases the sum of ph and poh is 14. however, the hydrogen ion concentration is not always going to be equal to exactly 1 x 10 raised to a negative number. for example, we skipped over the value of 2.0 x 10-7.

water at room temperature is flowing through a pipe with pressure taps located 10 ft apart along one section of the pipe, which are connected to a mercury (s=13.6) manometer.