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6 solve problems a and b below. a In the figure below, a string is tied to a sinusoidal oscillator at Pand runs over a rigid support at 0. and is stretched by a block of mass m. The L 1.77 m, the linear R 16 g/m, and the oscillator frequency Hz. The amplitude of the motion at P is small enough for that point to be considered a node. A node also exists at If m- 2.000 kg is needed for the fourth harmonic (with four antinodes) as shown, then find the mass m needed to get the sevenrh harmonic (with seven antinodes b. stretched string has mass per unit length of 5.78 g cm and a tension of 14.8 N. A sinusoidal wave on this string has an amplitude of0.113 mm and a frequency of 147 Hz and is traveling in the negative direction ofan.raxis. If the wave equation is of the form yfry y- sin(kx cot), what are (i) y (in mm), (i) k, and (iii)
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