Why are strength and hardness of a plastic usually linearly related?
What will be an ideal response?
Strength is a measure of the polymer chains' tendency or ability to limit inter-chain movement. Similarly hardness is defined by a polymer chain's ability to move among other chains. Both properties measure similar inter-chain interactions.
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Which of the following represents 0.118A?
A. 118 uA B. 1.18 mA C. 118 mA D. 1.18 kA
Los empalmes de cables se permiten en sistemas de bandeja portacables siempre y cuando:
a. no estén en recorridos horizontales. b. se encierren en una caja de empalmes. c. se hagan y aíslen mediante métodos NEC® aprobados. d. se utilicen en bandeja portacables de fondo sólido.
Which gas furnace type produces water during normal operation?
a. Natural-draft b. Induced-draft c. Condensing d. Mid-efficiency
A system is described by 
Classify the system as to linearity, time invariance, memory, causality, and stability.
What will be an ideal response?