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3 years ago

The pattern of repeating properties of elements revealed in the periodic table is known as the (Blank)

2 answers:

4 0

<span>The pattern of repeating properties of elements revealed in the periodic table is known as the periodic law.</span>

Paraphin [41]3 years ago

3 0

It is known as periodic law

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Calculate the minimum wavelength (λ0) for the continuous spectrum of X-rays emitted when.. a) 30-kV electrons strike a cobalt (C

Sholpan [36]

Explanation:

The relationship between the wavelength and the potential difference V is given by :

$\lambda=\dfrac{h}{\sqrt{2me}}\times \dfrac{1}{\sqrt{V}}$

Putting the values of known parameters,

$\lambda=\dfrac{12.28}{\sqrt{V} }\times 10^{-10}\ m$

(a) $V=30\ kV=30000\ V$

$\lambda=\dfrac{12.28}{\sqrt{30000} }\times 10^{-10}\ m$

$\lambda=7.08\times 10^{-12}\ m$

(b) $V=60\ kV=60000\ V$

$\lambda=\dfrac{12.28}{\sqrt{60000} }\times 10^{-10}\ m$

$\lambda=5.01\times 10^{-12}\ m$

Hence, this is the required solution.

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4 years ago

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Doss [256]

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P = density*acceleration due to gravity*height

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P = 1000 kg/m3*9.81m/s2*9100m
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3 years ago

The Force Of Gravity Acting On A Childs Mass On Earth Is 490 newtons whats the childs mass

Flauer [41]

Force of gravity on an object is the weight of the object and is given by mass times accerelation due to gravity. The accerelation due to gravity is the accerelation of an object in free fall and is given by 9.8m/s^2. Given that the force of gravity acting on a child's mass on earth is 490 newtns, i.e. F = mg which means that 490 newtons = 9.8 times mass. Therefore, mass of the child is 490 / 9.8 = 50 kg.

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4 years ago

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Alja [10]

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3 years ago

Read 2 more answers

Wind, solar, and water power are all examples of ______. Nonrenewable resources, alternative sources of energy, free sources of

aliya0001 [1]

Answer:

i'm pretty sure it is alternative sources of energy.

Explanation:

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3 years ago