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A river narrows at rapids from a width of 15 meter to a width of only 6 meter. The depth of the river before the rapids is 2.6 meter; the depth in the rapids is 0.85 meter. Obtain the speed of water flowing in the rapids, given that its speed before the rapids is 1 meter per second. Suppose the river has a rectangular cross section?
A 5.3kg box is on a frictionless 36^\circ slope and is connected via a massless string over a massless, frictionless pulley to a hanging 1.6kg weight. A- What is the tension in the string if the 5.3kg box is held in place, so that it cannot move? B- ..
A sphere of radius r starts from rest and rolls without slipping along a curved surface, dropping through a verticaldistance of 0.411 m. Find the final speedv of the sphere's center of mass.
the nucleus of 8be which consists of 4 protons and 4 neutrons is very unstable and spontaneously breaks into two alpha
A 16.0 m uniform ladder weighing480 N rests against a friction less wall. The ladder makes a 61.0° angle with the horizontal. Discover the horizontal and vertical forces the ground exerts on the base of the ladder when an 840 N fire fighter is 4.20 m..
What is the net force exerted on the skier, assuming his acceleration is constant.
when 105 mL of water at 22 C is mixed with 68mL of water at 95 C, what is the final temperature? suppose no heat is lost to the surroundings and density of water is 1 g/mL.
A student is reading a lecture written on a blackboard. The lenses in her eyes have a refractive power of 69.40 diopters, How far (in meters) is the blackboard from her eyes
An amateur astronomer decides to build a telescope from a discarded pair of eyeglasses. One of the lenses has a refractive power of 11 diopters, while the other has a refractive power of 1.1 diopters.
The ground state for a quantum Hall system on a torus by fractional filling factor can be classified by the Chern number, which is why the Hall conductance is quantized. Is there another method or classification one can utilize to distinguish states?
question1attempting to stop on a slippery road a car moving at 85 skids across a road at a 30 angle to its initial
A cardiac pacemaker can be affected by the static magnetic field as small as 1.7 mT. How close can a pacemaker wearer come to a long, straight wire carrying 19 A.
a scaffold of mass 56 kg and length 5.5 m is supported in a horizontal position by a vertical cable at each end. a
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