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3 years ago

24. Every magnet, regardless of its shape, has twoO magnetic charges.O magnetic poles.magnetic fields.O magnetic domains.

Physics

1 answer:

Irina18 [472]3 years ago

7 0

I would have to say 2 Magnetic Poles.

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Carbon forms four ionic bonds in its compounds. t or f

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3 years ago

Samples of different materials, A and B, have the same mass, but the sample

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Answer:

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2 years ago

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Vika [28.1K]

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3 years ago

What is the maximum kinetic energy of ejected electrons when photons of wavelength 300 nm hit a metal that has a work function o

Sonja [21]

Explanation:

Given that,

Wavelength of the photon, $\lambda=300\ nm=3\times 10^{-7}\ m$

Work function of the metal, $\phi=1.13\ eV=1.81\times 10^{-19}\ J$

We need to find the maximum kinetic energy of the ejected electrons. It can be calculated using Einstein's photoelectric equation as :

$hf=E_k+\phi$

$E_k=hf-\phi$

$E_k=h\dfrac{c}{\lambda}-\phi$

$E_k=6.63\times 10^{-34}\times \dfrac{3\times 10^8}{3\times 10^{-7}}-1.81\times 10^{-19}$

$E_k=4.82\times 10^{-19}\ J$

$E_k=3.01\ eV$

$E_k=3\ eV$

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3 0

3 years ago

What is the electric flux through the surface a1 that encloses all three objects?

vovangra [49]

For the answer to the question above, I assume that the question is two objects, O1 and O2 have charges +1.0 µC and -1.9 µC, respectively, and a third object, O3,?two objects, O1 and O2 have charges +1.0 µC and -1.9 µC, respectively, and a third object, O3, is electrically neutral.
From Gauss's law:
Flux = ∫c E . dA = q/eo 

Since this surface encloses all 
charge, we can simplify: 

Flux = (q1+q2+q3)/eo 
Flux = 
( (1*10^-6)+(-1.9*10^-6)+(0) )/(8.85*10^-12) = -101694.92 N·m2/C

6 0

3 years ago