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If a boat has a speed of 6.75 m/s and goes north directlyacross a river and back. The current is moving east at 0.50 m/s. Atwhat angles must the boat br steered? How long does it take for theround trip? tan-1 0.50 m/s 6.75 m/s = 85.76 degrees and to find thetime 150 m /6.75 = 22.2 s Then for the round trip 22.2 s * 2 = 4.44s.
What is the smallest distance between the speakers for which the interference of the sound waves is destructive
suppose you have a heat engine operating between 230 C and 100.0 c. it achieves 20.0% of the maximum possible efficiency(carnot Efficiency). what energy input will enable the engine to perform 12.0 kJ of work?
A vessel whose walls are thermally insulated contains 2.5 {rm kg} of water and 0.6 {rm kg} of ice, all at a temperature of 0.0 ^circ {rm{C}}. The outlet of a tube leading from a boiler in which water is boiling at atmospheric pressure is inserted ..
The top-most tooth is protruding slightly, and the tension in the wire exerts two forces, what is the magnitude of the net force exerted on the tooth
A 4.38-kN piano is lifted by three workers at a constant speed to an apartment 27.2 m above the street using a pulley system fastened to the roof of the building. find the time required to lift the piano from the street to the apartment
A 2,000 m wide river has a current of vector(v) = 2 i m/s. A boat which has a maximum speed of 5m/s with respect to the river, What is the velocity of the boat with respect to the bank
You have a 10.9 m straight wire carrying a 9.89 A current. What is the magnitude of the force on the wire when it is in a 0.83 T magnetic field perpendicular to the wire
A spring with spring constant 36N/m is attached to the ceiling, and a 5.1-cm-diameter, 1.3kg metal cylinder is attached to its lower end. what length of the cylinder is submerged
A 0.25 kg skeet (clay target) is fired at an angle of 28 degrees to the horizon with a speed of 25 m/s.
A bird sits on a telephone wire midway between two poles 20 meters apart. The wire, assumed weightless, sags by 50 cm. If the tension in the wire is 90 Newtons, what is the mass of the bird?
Which of the following devices uses total internal reflection function?
The 15g head of a bobble-head doll oscillates in SHM at a frequency of 4.0Hz. What is the head's time constant
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