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Q. A cannonball shot with an initial velocity of 148 m/s at an angle of 46° follows a parabolic path and hits a balloon at top of its trajectory. Neglect air resistance, how fast is the cannonball going when it hits the balloon?

Q. The length of a string is 532cm. It is held fixed at each end. The string vibrates in seven sections; i.e. string has seven antinodes, and the string vibrates at 150 Hz. What is the wavelength?

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