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sergejj [24]
3 years ago
14

How do magnetic forces repel or attract?

Physics
1 answer:
Lerok [7]3 years ago
3 0

“Magnets are surrounded by an invisible magnetic field that is made by the movement of electrons, the subatomic particles that circle the nucleus of an atom”



“Every magnet has both a north and a south pole. When you place the north pole of one magnet near the south pole of another magnet, they are attracted to one another. When you place like poles of two magnets near each other (north to north or south to south), they will repel each other.”
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Light of wavelength 550nm in air is found to travel at 1.96
Sedaia [141]

Answer:

ν = 5.45 x 10¹⁴ Hz

Explanation:

given,

wavelength of light = 550 nm

                                = 550 x 10⁻⁹ m

speed of light = 1.96 x 10⁸ m/s

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frequency of the light = ?

we know.

v = \nu \lambda

frequency of the light in the liquid is same as the frequency of the light in the air.

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\nu = \dfrac{v}{\lambda}

\nu = \dfrac{3\times 10^{8}}{550\times 10^{-9}}

    ν = 5.45 x 10¹⁴ Hz

Hence, the frequency of light in the liquid is equal to ν = 5.45 x 10¹⁴ Hz

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A 1500 kg car travels 50 m north in 20 seconds. What is the magnitude of the average velocity of the car during the 20 second in
aliina [53]

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a. 2.5 m/s

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