Frequency of the reflected ultrasonic echo
A bat flying straight toward a wall at 11m/s emits a pulse at 60kHz. What is the frequency of the reflected ultrasonic echo wave reaching a stationary observe standing under the bat? Take the speed of sound to be 341m/s.
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What about exponentiation? Find all solutions in positive real numbers to (a∧b)∧c =a∧(b∧c). If stuck, Consider more restricted questions, such as what are all the solutions to this equation if a,
A wheel of radius .1m and mass of 20kg rotates at 100rpm. If we want the wheel to stop after 5 revolutions, what constant angular acceleration must be applied to the wheel?
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Calculate the incremental net operating income (Negative amount should be indicated with a minus sign. Do not round intermediate calculations.)
Susan Sweets is a 40 percent shareholder in Acclaim Inc., a theatrical supplies company. She transfers a fully depreciated car with a value of $2,000 to the corporation, but does not receive any consideration for it.
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A juvenile elephant has a mass of 300kg. He wishes to fly using his very large ears. If the air speed on top of his ears is 30m/s and the speed below his ears is 22m/s, find the total surface area of his two ears.
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