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One cubic meter of water flowing over Niagara Falls in New York drops 98.1 meters. If all the energy of the water is converted to heat, how much heat energy would the water have?
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Question: The radius of the earth's orbit around the sun (assumed to be circular) is 1.5*10^8 km , and the earth travels around this orbit in 365 days. a) What is the magnitude of the orbital velocity of the earth in m/s ...
Question: A simple pendulum oscillates with frequency f. a) what is its frequency if the entire pendulum accelerated 0.43 g upward? b) what is its frequency if the entire pendulum accelerates 0.43 g downwards? The respon ...
Questin: A research submarine has a 30-cm-diameter window that is 9.0cm thick. The manufacturer says the window can withstand forces up to 1.2*10^6N . What is the submarine's maximum safe depth in salt water? The pressur ...
Question: The siren of a fire engine that is driving northward at 31.0 m/s emits a sound of frequency 2020 Hz. A truck in front of this fire engine is moving northward at 19.0 m/s. a) What is the frequency of the siren's ...
Quesion: When a nucleus of 235U undergoes fission, it breaks into two smaller, more tightly bound fragments. Part A: Calculate the binding energy per nucleon for 235U. Express your answer with the appropriate units. E=__ ...
Question: A sled of mass m is being pulled horizontally by a constant upward force of magnitude F that makes an angle theta with the direction of motion. The coefficient of kinetic friction is mu_k. The average velocity ...
Question: A student standing in a canyon yells "echo," and her voice produces a sound wave of frequency of f = 0.56 kHz. The echo takes t = 3.5s to return to the student. Assume the speed of sound through the atmosphere ...
Question: For a patient, a doctor prescribes glasses with a converging lens having a power of 4.0 D. Is the patient nearsighted or farsighted? The response must be typed, single spaced, must be in times new roman font (s ...
Question: Suppose the free-fall acceleration at some location on earth was exactly 9.8000 m/s^2. What would it be at the top of a 1000 -tall tower at this location? The response must be typed, single spaced, must be in t ...
Question: What is the potential difference across the 10 Ω resistor in the figure ? What is the potential difference across the 20 Ω resistor in the figure?
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