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Kazeer [188]
3 years ago
5

Name the nutrients required for thebody.​

Physics
1 answer:
Anettt [7]3 years ago
6 0

Answer:

1- water

2- fat

3- carbohydrates

4- vitamins

5- minerals

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7.22 Ignoring reflection at the air–water boundary, if the amplitude of a 1 GHz incident wave in air is 20 V/m at the water surf
Serga [27]

Answer:

z = 0.8 (approx)

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given,

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depth of water when amplitude is down to  1 μV/m

Intrinsic impedance of air = 120 π  Ω

Intrinsic impedance of  water = \dfrac{120\pi}{\epsilon_r}

Using equation to solve the problem

  E(z) = E_0 e^{-\alpha\ z}

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\alpha = \dfrac{\sigma}{2}\sqrt{\dfrac{(120\pi)^2}{\Epsilon_r}}

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\alpha =21.07\ Np/m

now ,

  1 \times 10^{-6} = 20 e^{-21.07\times z}

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3 years ago
How do you calculate elastic potential energy
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U=1/2kx2

This image sums it up
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A force of 150N at an angle of 60 degree to the horizontal to pull a box through a distance of 50m calculate the work done
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\boxed{\sf W=Fscos\Theta}

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\\ \sf\longmapsto W=3750J

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3 years ago
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