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A student uses an audio oscillator of adjustable frequency to measure the depth of a water well. Two successive resonant frequencies are heard at 143 HZ and 169 HZ. What is the depth of the well? The speed of sound in air is 344 m/s. Answer in units of m
A 5.01E+4 kg space probe is traveling at a speed of 12600 m/s through deep space. Retrorockets are fired along the line of motion to reduce the probe's speed, What is the final speed of the probe?
A black hole attracts an object with mass m with a force of mc2RS/(2r2), where r is the distance between the object and the center of the black hole. What is the mass of this black hole
A hiker's trip consists of three segments. Path A is 9km long heading 60.0° north of east. Path B is 6.0km long in a direction due east. Path C is 5.0 km long heading 315° counter clockwise from east.
Provide equations allowing to find moment of inertia of a solid cylinder and of a cylindrical ring
A small compass is held horizontally, the center of its needle a distance of 0.140 m directly north of a long wire that is perpendicular to the earth's surface, What direction does the current in the wire flow, toward or away from the earth's surfa..
When a potential difference of 140V is applied to the plates of an air-filled parallel-plate capacitor the plates carry a surface charge density of 4.20E-10
If 1800J of heat are added to a 190-g object, its temperature increases by 10o C. What is the heat capacity of this object
A gymnast is performing a floor routine. In a tumbling run she spins through the air, How much time does this maneuver take
An electron with an initial speed of 4.90×105m/s is brought to rest by an electric field. What was the potential difference that stopped the electron
A water hose of internal diameter 12.5 mm is used to fill a bucket. It is noted that 8L of fresh water (about 2 gallons) is collected in 1 minute. what is the rate of flow expressed as m^3/sec
Smoking causes blood vessels to constrict. If the average blood vessel radius of a smoker decreases 1.6% Calculate the needed percent increase in pressure
A boat is traveling upstream at 20 km/h with respect to the water of a river. The water is flowing at 4.0 km/h with respect to the ground. What is the speed of the boat with respect to the ground
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