Kevlar is a fiber which is used in making of bullet proof vests and armors. It is a co-polymer which is formed by condensing two organic molecules 1,4-phenylene-diamine and terephthaloyl chloride.

$NH_2C_6H_4NH_2+Cl-(CO)-C_6H_4-(CO)-Cl\xrightarrow[-2HCl]{ }$

$NH_2-C_6H_4-NH-CO-C_6H_4-COOH$

For Structure refer to image attached.

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2 years ago

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Conditioning is the process of

Lisa [10]

Conditioning is the process of C. learning associations.

Two types of conditioning.
1) Classical conditioning
2) Operant conditioning.

Classical conditioning happens when an individual learns to associate two stimuli. This happens when an association is learned between an unconditioned stimulus and a conditioned stimulus.

Operant conditioning happens when an individual associates a behaviour with a consequence. For example, when a behaviour produces a good consequence; the individual is conditioned to repeat the behaviour to garner the same good consequence, and vice versa.

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3 years ago