Physics, 18.03.2021 03:00 kaylallangari1509
CER AJUTOR IMEDIAT
O placă dreptunghiulară cu lăţimea l = 1m şi lungimea L = 2m se încălzeşte cu 100ºC. Prin măsurare, un elev contată că lăţimea plăcii se măreşte cu 2mm (la încălzirea cu 100ºC).
Cu cât se dilată placa în lungime?
Calculati latimea si lungimea placii dilatate si aria acesteia.
Cu cât s-ar alungi o bară din acelaşi material având lungimea de 40m dacă s-ar încălzi cu 25ºC?
Answers: 3
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Atotal charge of –6.50 µc is uniformly distributed within a sphere that has a radius of 0.150 m. what is the magnitude and direction of the electric field at 0.300 m from the surface of the sphere? a) 2.89 × 105 n/c, radially inward b) 6.49 × 105 n/c, radially outward c) 4.69 × 105 n/c, radially inward d) 9.38 × 105 n/c, radially outward e) 1.30 × 106 n/c, radially inward
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J. j. thomson’s experiment disproved the theory that an atom
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CER AJUTOR IMEDIAT
O placă dreptunghiulară cu lăţimea l = 1m şi lungimea L = 2m se încălzeşte cu 10...
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