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Q1. A student produced an interference pattern using microwaves by placing a double slit in front of a microwave generator. If the slits are 5.04 cm apart and the antinodes of the pattern are 14.50 cm apart at a distance of 1.54 cm from the slits, what is the frequency of microwaves? (6.21 x 10^8 Hz)

Q2. A 38.8-cm diameter disk rotates with a constant angular acceleration of 2.60 rad/s2. It starts from rest at t = 0, and the line drawn from the center of the disk to the point P on the rim of the disk makes an angle of 57.3° with the positive x-axis at this time. Find the position of P (in degrees, with respect to the positive x-axis) at t = 2.30 s?

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