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3 years ago

Which of these represent a velocity a.123 km/sec. b.34 m/min east

2 answers:

4 0

Velocity is a vector so it can have a magnitude and direction.

B. 34 m/min east
^magnitude ^direction

hope this helps :)

MA_775_DIABLO [31]3 years ago

4 0

The answer would be:

B.

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3 years ago

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A circular parallel plate capacitor is constructed with a radius of 0.52 mm, a plate separation of 0.013 mm, and filled with an

olya-2409 [2.1K]

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289282

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d = Plate separation = 0.013 mm

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V = Potential applied = 2 mV

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$C=\dfrac{k\epsilon_0A}{d}$

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$Q=CV\\\Rightarrow Q=\dfrac{k\epsilon_0AV}{d}\\\Rightarrow Q=\dfrac{40\times 8.854\times 10^{-12}\times\pi \times (0.52\times 10^{-3})^2\times 2\times 10^{-3}}{0.013\times 10^{-3}}\\\Rightarrow Q=4.6285\times 10^{-14}\ \text{C}$

Number of electron is given by

$n=\dfrac{Q}{e}\\\Rightarrow n=\dfrac{4.6285\times 10^{-14}}{1.6\times10^{-19}}\\\Rightarrow n=289281.25\ \text{electrons}$

The number of charge carriers that will accumulate on this capacitor is approximately 289282.

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2 years ago