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spayn [35]
3 years ago
9

The emission of x rays can be described as an inverse photoelectric effect.

Physics
1 answer:
timama [110]3 years ago
4 0

Answer:

The potential difference through which an electron accelerates to produce x rays is 1.24\times 10^4\ volts.                                                  

Explanation:

It is given that,

Wavelength of the x -rays, \lambda=0.1\ nm=0.1\times 10^{-9}\ m

The energy of the x- rays is given by :

E=\dfrac{hc}{\lambda}

The energy of an electron in terms of potential difference is given by :

E=eV

So,

\dfrac{hc}{\lambda}=eV

V is the potential difference

e is the charge on electron

V=\dfrac{hc}{e\lambda}

V=\dfrac{6.63\times 10^{-34}\times 3\times 10^8}{1.6\times 10^{-19}\times 0.1\times 10^{-9}}

V = 12431.25 volts

or

V=1.24\times 10^4\ volts

So, the potential difference through which an electron accelerates to produce x rays is 1.24\times 10^4\ volts. hence, this is the required solution.

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An unruly student with a spitwad (a lump of wet paper) of mass 20 g in his pocket finds himself in the school library where ther
jeka94

Answer:

T = 188.5 s, correct is  C

Explanation:

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        L₀ = r m v₀ + I₀ w₀

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angular and linear velocity are related

        v = r w

        w = v / r

        m r v₀ = I₀ v / r + m r v

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       v = \frac{m}{\frac{I_o}{r}  +mr} \ r v_o

let's calculate

       v = \frac{0.020}{\frac{1.4}{0.6  } + 0.020 \ 0.6  } \ 0.6 \ 4

       v = \frac{0.020}{2.345} \ 2.4

       v = 0.02 m / s

         

To calculate the time of a complete revolution we can use the kinematics relations of uniform motion

        v = x / T

         T = x / v

the distance of a circle with radius r = 0.6 m

         x = 2π r

we substitute

         T = 2π r / v

let's calculate

         T = 2π 0.6/0.02

         T = 188.5 s

reduce

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6 0
3 years ago
Which physical activity would a global positioning system resource help you with?
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<h3>Function of Global positioning system ( GPS ) </h3>

GPS helps with the accurate measurement of physical activities  and factors such as location, time, elevation and so on. When hiking, the time, distance covered and location of the hiker  can be accurately measured with the use of the GPS.

Hence we can conclude that The physical activity that a global positioning system resource can help me with is  Hiking.

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4 0
2 years ago
Compared to a stationary galaxy, light from a galaxy that is moving away from earth will appear _____.
Vlad1618 [11]
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3 years ago
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What volume (in liters) of gasoline has a total heat of combustion equal to the energy obtained in part (a)? (see section 17.6;
antiseptic1488 [7]
<h3><u>Answer;</u></h3>

volume = 6.3 × 10^-2 L

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but; 1000 L = 1 m³

Hence, <u>volume = 6.3 × 10^-2 L</u>

8 0
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