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Question: A rope is connected between two point A and B 120cm apart at the same level . a load of 200N is suspended from a point C in the rope 45cm from , find the load that should be suspended from the rope D 30cm from B, which will keep the rope CD horizontal.
A beam of visible light has a wavelength of 513 nm and shines perpendicularly on a surface. As a result, there are 4.2 x 1018 photons per second striking the surface. By using the impulse-momentum theorem (Section 7.1), get the average force that thi..
A rock is projected from the edge of the top of the building with an initial velocity of 12.2 m/s at an angle of 53 degrees above the horizontal. The rock strikes the ground a horizontal distance of 25m from the base of the building. Assume that t..
A heat pump uses an ideal Carnot cycle to heat a house. The outside air has a temperature of 292 K, What is the coefficient of performance of this heat pump
To push a 62.0-kg crate up a frictionless incline angled at 27.0° to the horizontal, a worker exerts a force of 408 N parallel to the incline. What work is done on the crate by the weight of the crate
A golfer hits a ball from an elevated height that is located in a horizontal distance of 180 meter from the hole. Determine the speed of the ball the instant before it lands in the hole
A projectile is fired at 60.0 o above the horizontal. Its initial speed is equal to 150.0 m/s. Like most problems in this class (2010), ignore the effects of air unless told otherwise
An iron anchor of density 7870 kg/m^3 appears 200 N lighter in water than in air. What is the volume of the anchor
A very thin sheet of plastic (n=1.60) covers one slit of adouble-slit apparatus illuminated by 640-nm light, What is the (minimum) thickness of the plastic
Water (? = 1.00E-3 Pa*s) is flowing through a horizontal pipe with a volume flow rate of 0.0129 m3/s. Calculate the radius of the horizontal pipe
Your friend decides to produce electrical power by turning a coil of 100,000 circular loops of wire around an axis parallel to a diameter in the Earth's magnetic field, What will be the average power obtained from this device
A 1 m diameter wagon wheelconsists of a thin rim having a mass of 6 kg and six spokes, eachwith a mass of 1.5 kg. Find the moment of inertia of the wagon wheel for rotation about its axis
A runner is practicing on a circular track that is 535 m in circumference. From the point farthest to the east on the track, he starts off running due south and follows the track as it curves around toward the west.
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