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Blue whales apparently communicate with each other using sound of frequency 17.0 , which can be heard nearly 1000 away in the ocean. What is the wavelength of such a sound in seawater, where the speed of sound is 1538 ?
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Question: A researcher observes hydrogen emitting photons of energy 1.13eV . What are the quantum numbers of the two states involved in the transition that emits these photons? Express your answers as integers separated ...
A clock is set against an accurate standard and 30 days later is found to be in error by 12 seconds. What is the percentage of error in its time keeping?
Question: A particle initially located at the origin has an acceleration of a= 2.00j m/s2 and an initial velocity of Vi = 7.00i m/s. (a) Find the vector position of the particle at any time t (where t is measured in seco ...
Question: The passengers in a roller coaster car feel 50% heavier than their true weight as the car goes through a dip with a 30.0 m radius of curvature. What is the car's speed at the bottom of the dip? The response mus ...
Question: In a pig-calling contest, a caller produces a sound with an intensity level of 107 dB. How many such callers would be required to reach the pain level of 120 dB? The response must be typed, single spaced, must ...
Question: A roller coaster car is going over the top of a 12-m-radius circular rise. At the top of the hill, the passengers "feel light," with an apparent weight only 60% of their true weight. How fast is the coaster mov ...
An artillery shell is fired at an angle of 48.1? above the horizontal ground with an initial speed of 1920 m/s. The acceleration of gravity is 9.8 m/s2. Find the total time of flight of the shell, neglecting air resistan ...
Question: A proton has an initial speed of 3.5 x 10 5 m/s. a) What potential difference is required to bring the proton to rest? b) What potential difference is required to reduce the initial speed of the proton by a fac ...
Question: A sled of mass m is being pulled horizontally by a constant horizontal force of magnitude F. The coefficient of kinetic friction is Îk. During time interval t, the sled moves a distance s, starting from rest. P ...
After examining a cube-shaped object, explain, based on your observations, why Earth is not shaped like a cube? Describe 4 reasons with evidence to support each one.
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