3 years ago

What are atoms of the same element with different numbers of neutrons called?

Physics

1 answer:

Andrei [34K]3 years ago

6 0

Answer:

These are called isotopes.

Explanation:

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Enter your answer in the provided box. The mathematical equation for studying the photoelectric effect is hν = W + 1 2 meu2 wher

siniylev [52]

Answer:

$v = 4.44 \times 10^5 m/s$

Explanation:

By Einstein's Equation of photoelectric effect we know that

$h\nu = W + \frac{1}{2}mv^2$

here we know that

$h\nu$ = energy of the photons incident on the metal

$W$ = minimum energy required to remove photons from metal

$\frac{1}{2}mv^2$ = kinetic energy of the electrons ejected out of the plate

now we know that it requires 351 nm wavelength of photons to just eject out the electrons

so we can say

$W = \frac{hc}{351 nm}$

here we know that

$hc = 1242 eV-nm$

now we have

$W = \frac{1242}{351} = 3.54 eV$

now by energy equation above when photon of 303 nm incident on the surface

$\frac{1242 eV-nm}{303 nm} = 3.54 eV + \frac{1}{2}(9.1 \times 10^{-31})v^2$

$4.1 eV = 3.54 eV + (4.55 \times 10^{-31}) v^2$

$(4.1 - 3.54)\times 1.6 \times 10^{-19}) = (4.55 \times 10^{-31}) v^2$

$8.96 \times 10^{-20} = (4.55 \times 10^{-31}) v^2$

$v = 4.44 \times 10^5 m/s$

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3 years ago

If limestone is exposed to the right amount of heat and pressure what might it become

Sedbober [7]

It would become a type of metamorphic rock. Most likely marble

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If the force acting on a body of mass 40 k.g is doubled by how much will the acceleration change

disa [49]

Answer:

Explanation:

Ignoring friction, the acceleration will double

F = ma

2F = m(2a)

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A pilot can withstand an acceleration of up to 9g, which is about 88 m/s2, before blacking out. (a) What is the acceleration exp

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Yes the plot dose make it with out baking out

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maria [59]

.75(m/s)^2

Use this picture
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