Wave 1 has amplitude of 9.0 units and wave 2 has amplitude 4.0 units. What is the ratio of their intensities, I1/I2?

A. 20
B. 5.1
C. 2.3
D. 1.5
E. 1.3


B. 5.1

Physics & Space Science

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A 60.0-kg mass person wishes to push a 120-kg mass box across a level floor. The coefficient of static friction between the person's shoes and the floor is 0.700

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Velocity: A runner ran the marathon (approximately 42.0 km) in 2 hours and 57 min. What was the average speed of the runner in m/s?

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Which of the following isotopes is radioactive?

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