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Lady bird [3.3K]

2 years ago

15

Why does a metal spoon left on a bowl of hot soup become warm? A) Metal is a conductor. B) Metal is an insulator. C) Metal produ

ces its own heat. D) Metal heats up from magnetism.

2 answers:

Vlada [557]2 years ago

8 0

Answer:

a IT'S A

Explanation:

mr_godi [17]2 years ago

5 0

A: Metal is a conductor it hold the heat

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Structures on a bird feather act like a diffraction grating having 8000 8000 lines per centimeter. What is the angle of the firs

sammy [17]

Answer:

Angle of first order maximum, $\theta=21.19^{\circ}$

Explanation:

Given that,

Wavelength of the light, $\lambda=452\ nm=452\times 10^{-9}\ m$

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$d=\dfrac{1}{N}$

$d=\dfrac{1}{8000/cm}$

$d=0.000125\ cm=1.25\times 10^{-6}\ m$

The equation of grating is given by :

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So, the angle of the first-order maximum is 21.19 degrees. Hence, this is the required solution.

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