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BlackZzzverrR [31]
3 years ago
14

A charge of 70 A ·h (ampere-hours) moves through a poten- difference of 25 V. What are (a) the charge in coulombs and(b) the mag

nitude of the change in the potential energy of the charge?
Physics
1 answer:
kenny6666 [7]3 years ago
3 0

Answer

Given,

Charge, q = 70 A.h

Potential difference, V = 25 V

a) Charge, q = ?

we know that

  q= I t

    = 70 A.h

    = 70 x 60 x 60 A.s

    = 252,000 C

b) Potential energy of the charge

      U = q V

      U =  252,000 x 25

      U = 6,300,000 J

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The two most prominent wavelengths in the light emitted by a hydrogen discharge lamp are 656 nm (red) and 486 nm (blue). Light f
Georgia [21]

Answer:

Δd = 7.22 10⁻² m

Explanation:

For this exercise we must use the dispersion relationship of a diffraction grating

           d sin θ = m λ

let's use trigonometry

           tan θ = y / L

     

how the angles are small

           tant θ = sinθ  /cos θ = sin θ

we substitute  

           sin θ = y / L

          d y / L = m λ

          y = m λ L / d

let's use direct ruler rule to find the distance between two slits

           

If there are 500 lines in 1 me, what distance is there between two lines

         d = 2/500

        d = 0.004 me = 4 10⁻⁶ m

diffraction gratings are built so that most of the energy is in the first order of diffraction m = 1

let's calculate for each wavelength

λ = 656 nm = 656 10⁻⁹ m

         d₁ = 1 656 10⁻⁹ 1.7 / 4 10⁻⁶

         d₁ = 2.788 10⁻¹ m

λ = 486 nm = 486 10⁻⁹ m

         d₂ = 1 486 10⁻⁹ 1.7 / 4 10⁻⁶

         d₂ = 2.066 10⁻¹ m

the distance between the two lines is

         Δd = d1 -d2

         Δd = (2,788 - 2,066) 10⁻¹

         Δd = 7.22 10⁻² m

6 0
3 years ago
A pair of narrow, parallel slits separated by 0.254 mm are illuminated by green light of wavelength 559 nm. An interference patt
UkoKoshka [18]

Answer: 3.76 mm

Explanation: The formulae that defines the position of a nth fringe from the center of a double slit interference experiment is given below as

y =R×mλ/d

Where y = distance between the nth fringe and the center

R = distance between slits and screen = 1.71 m

m = position of fringe = 1

d = distance between slits = 0.254 mm = 0.000254m

λ = wavelength of light = 559 nm = 559×10^-9m

By substituting parameters, we have that

y = 1.71×1×559×10^-9/0.000254

y = 0.00000095589 / 0.000254

y = 0.00376m = 3.76 mm

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A small car and a large heavier bus are traveling at the same speed. Which has more momentum?
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Answer:

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Explanation:

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When drawing a Bohr model for an element that has 16 electrons, how many electrons would be placed in the third energy level?
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