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When a beam of 10.6 eV photons of intensity 2.0 W/m² falls on a platinum surface of area 1.0 x 10^-4 m² and work function 5.6 eV, 0.53% of the incident photons eject photoelectrons. Find the number of photoelectrons emitted per second and their minimum and maximum energies (in eV). Take 1eV = 1.6 x 10^-19 J.

Chemistry

Write the Lewis dot structure of the following :

O₃, COCl₂

Mathematics

Let F(x) = f(x) g(x) h(x) for all real x, where f(x), g(x) and h(x) are differentiable functions. At some point x₀, F'(x₀) = 21 F(x₀), f' (x₀) = 4f(x₀), g'(x₀) = -7g(x₀) and h'(x₀) = kh(x₀) Then k = .............

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