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Answer updated on: 12 Feb 2020

Kinetic energy to electrical energy

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Answer updated on: 12 Feb 2020

Width of arrow

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382mUsing the time independent suvat equation - v^2 = u^2 +2as
s= vsquared/2a

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88.8 m/sUse time independent suvat equation: to find v,
u= 86.6
a = 9.81
s=20
Take downwards as positive since final velocity is downwards and so values are added.

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17.9 sYou can take distance independent suvat equation: v=u+at
v=88.8
u= - 86.6 (negative since downwards is positive)
a= 9.81 m/s

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1n

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Answer updated on: 12 Feb 2020

Reflected light is completely plane polarized

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X/4

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Answer updated on: 12 Feb 2020

Rotates plane of polarization

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Asked on: 28 Mar 2020

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Asked on: 18 Dec 2019

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