This physics problem tests your understanding of fundamental physical laws and their applications. The step-by-step solution below breaks down the problem using relevant equations and physical reasoning.

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7. Kulinganisha mabadiliko ya kimwili wakati wa ujana:
8. a) Kati ya vitu viwili vilivyoonyeshwa, kile kitakachofanya balbu kuwaka kikiunganishwa kati ya Point 1 na Point 2 ni msumari wa chuma (Steel nail).
b) Sababu ya jibu lako katika (a): Msumari wa chuma ni kondakta (conductor) wa umeme, unaoruhusu mkondo wa umeme kupita na kukamilisha mzunguko. Kigingi cha plastiki ni kizuizi (insulator) cha umeme na hakitaruhusu mkondo kupita.
9.
Mchoro (Diagram):
Maelezo ya kilichotokea: Kwa kuwa ncha zinazofanana za sumaku (N na N) zinaletwa karibu, zitapingana. Hii itasababisha magari kusukumana mbali kutoka kwa kila mmoja.
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This physics problem tests your understanding of fundamental physical laws and their applications. The step-by-step solution below breaks down the problem using relevant equations and physical reasoning.