5. Students launch a water bottle with a velocity of 20.0 m/s at an angle of 45 above the horizontal. What maximum height does the
5. Students launch a water bottle with a velocity of 20.0 m/s at an angle of 45 above the horizontal. What maximum height does the water bottle reach if it is launched from a height of 2.30 m? [APP - 4 marks] 6. A siren emitting a frequency of 400 Hz is moving towards a person with a velocity of 74.0 km/h. What is the frequency observed by the person? The speed of sound in air is 344 m/s. [THINK - 3 marks]
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