3 years ago

MULTIPLE CHOICE

Physics

2 answers:

Lady bird [3.3K]3 years ago

6 0

Answer:

abcdefghijklmnopqrstuvwxyz

boyakko [2]3 years ago

3 0

Soft skills are personal attributes that enable someone to interact effectively and harmoniously with other people. so therefore A and F

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A metal wire 1.50 m long has a circular cross section of radius 0.32 mm and an end-to-end resistance of 90.0 Ohms. The metal wir

elixir [45]

Answer:

So after stretching new resistance will be 0.1823 ohm

Explanation:

We have given initially length of the wire $l_1=150m$

Radius of the wire $r_1=0.32mm=0.32\times 10^{-3}m$

Resistance of the wire initially $R_1=90ohm$

We know that resistance is equal to $R=\frac{\rho l}{A}$ ,here $\rho$ is resistivity, l is length and A is area

From the relation we can say that $\frac{R_1}{R_2}=\frac{l_1}{l_2}\times \frac{A_2}{A_1}$

Now length of wire become 6.75 m

Volume will be constant

So $A_1l_1=A_2l_2$

So $\pi \times (0.32)^2\times150=\pi \times r_2^2\times 6.75$

$r_2=1.508mm$

So $\frac{90}{R_2}=\frac{150}{6.75}\times \frac{1.508^2}{0.32^2}$

$R_2=0.1823ohm$

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3 years ago

All the colors of the rainbow are hiding where?

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olchik [2.2K]

The answer would be A.Transverse

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Why does conduction occur more slowly in gases than in solids?

Nataly [62]

Onduction in gas is slower than in liquids and solids because the particles in a gas collide less often. Conduction in metals is faster because the electrons are free to move about

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The air pressure on the bottom of an airplane’s two wings is greater than the pressure on the top, providing an upward lift. Cal

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A=4 x 10⁵/10132.5

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for one wing=39.477 : 2 = 19.739 m²

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2 years ago