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insens350 [35]
2 years ago
13

A sheet of red paper will look black when illuminated with

Physics
2 answers:
aleksley [76]2 years ago
8 0

A sheet of red paper will look black when illuminated with:

A. Cyan Light

vovikov84 [41]2 years ago
6 0
It's cyan.  I believe it's because it has green and blue in it.
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A tennis ball is hit into the air with a racket. When is the balls kinetic energy the greatest?
madam [21]

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2 years ago
Fellow student of mathematical bent tells you that the wave function of a traveling wave on a thin rope is y(x,t)= 2.20 mm cos[(
bezimeni [28]

Answer

given,

y(x,t)= 2.20 mm cos[( 7.02 rad/m )x+( 743 rad/s )t]

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mass of the rope = 3.31 g

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y(x,t)= A cos[k x+ω t]

A is amplitude

now on comparing

a) Amplitude  = 2.20 mm

b) frequency =

     f = \dfrac{\omega}{2\pi}

     f = \dfrac{743}{2\pi}

          f = 118.25 Hz

c) wavelength

        k= \dfrac{2\pi}{\lambda}

        \lambda= \dfrac{2\pi}{k}

        \lambda= \dfrac{2\pi}{7.02}

        \lambda= 0.895\ m

d) speed

         v = \dfrac{\omega}{k}

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e) direction of the motion will be in negative x-direction

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  T = \dfrac{v^2\ m}{L}

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      T = 27.87 N

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  P = \dfrac{1}{2}m\ v \omega^2\ A^2

  P = \dfrac{1}{2}\times 0.00331\times 105.84\times 743^2\ 0.0022^2

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3 years ago
How many electrons are in the element that comes just before platinum in the periodic table?
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The element is iridium and it has 77 electrons

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