Diffraction occurs for all types of waves, including sound waves. high‐frequency sound from a distant source with wavelength 9.00 cm passes through a slit 12.0 cm wide. a microphone is placed 8.00 m directly in front of the center of the slit (point c). the microphone is then moved in a direction perpendicular to the line from the center of the slit. at what distances from c will the intensity detected by the microphone be zero?

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Very large accelerations can injure the body, especially if they last for a considerable length of time. one model used to gauge the likelihood of injury is the severity index ( ), defined as =/ . in the expression, is the duration of the accleration, but is not equal to the acceleration. rather, is a dimensionless constant that = the number of multiples of that the acceleration is equal to.in one set of studies of rear-end collisions, a person's velocity increases by 13.7 km/h with an acceleration of 36.0 m/s2 . let the + direction point in the direction the car is traveling. what is the severity index for the collision?

Cathy is pedaling down a steep hill on her bicycle and wants to be able to coast up the next hill, which is 25 meters high, without pedaling. cathy and her bicycle have a mass of 75 kg. assuming her bicycle is 100% efficient, what would her speed have to be?