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Nutka1998 [239]
2 years ago
11

Why do metals conduct electricity while nonmetals do not conduct electricity?

Physics
1 answer:
KATRIN_1 [288]2 years ago
5 0

upper one :

Each metal atom contributes one or more electrons . Note:-free and mobile electrons are responsible for high thermal and electrical conductivity of metals. metals contain lot of free electrons while nonmetals don't have it. metals conduct electricity due to the presence of free electrons which are absent in non-metals.

down one :

metals are good conductors of both heat and electricity, whereas nonmetals generally cannot conduct heat or electricity. ... Metalloids tend to be shiny like metals but brittle like nonmetals. Because they are brittle, they may chip like glass or crumble to a powder if struck.

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3 years ago
Imagine a ringing bell set inside a sealed glass jar. Once all the air is removed and a vacuum is crated, the ringing sound is n
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working...

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5 0
3 years ago
(8c8p49) A 115g Frisbee is thrown from a point 1.00 m above the ground with a speed of 12.00 m/s. When it has reached a height o
IgorLugansk [536]

Answer:

The work done on the Frisbee is 1.36 J.

Explanation:

Given that,

Mass of Frisbee, m = 115 g = 0.115 kg

Initial speed of Frisbee, u = 12 m/s at a point 1 m above the ground

Final speed of Frisbee , v = 10.9674 m/s when it has reached a height of 2.00 m. Let W is the work done on the Frisbee by its weight. According to work energy theorem, the work done is equal to the change in its kinetic energy. So,

W=\dfrac{1}{2}m(v^2-u^2)\\\\W=\dfrac{1}{2}\times0.115\times\left((10.9674)^{2}-(12)^{2})\right)\\\\W=-1.36\ J

So, the work done on the Frisbee is 1.36 J. Hence, this is the required solution.

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