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A 26.0 kg hammer strikes a steel spike 2.40 cm in diameter while moving with speed of 20.0 m/s. The hammer rebounds with speed 10.0 m/s after 0.110 s. What is the average strain in the spike during the impact?
A 0.60-kg ball, attached to the end of a horizontal cord, is rotated in a circle of radius 1.1m on a frictionless horizontal surface. If the cord will break when the tension in it exceeds 75N , what is the maximum speed the ball can have?
A space traveler moving at a speed of 0.59c with respect to the earth makes a trip to a distant star that is stationary relative to the earth. He measures the length of this trip to be 8.5 light-years. What would be the length of this same trip (in l..
You connect five identical resistors in series to a battery whose EMF is 12.0 V and whose internal resistance is negligible. obtain the potential difference across each resistor
Three single-phase step-up transformers rated at 10MVA, 4.6kV/13.8kV are connected in Wye-Delta configuration. The three transformers are used to feed a 20MVA load at 0.9 p.f. With an efficiency of 96%. Find the secondary line voltage.
A 0.12-kg ball is placed in a shallow wedge with an opening angle of 120°, as shown in the figure. For each contact point between the wedge and the ball, determine the force exerted on the ball. Assume the system is frictionless. Find contact force o..
At a certain time a particle had a speed of 77 m/s in the positive x direction, and 3.3 s later its speed was 36 m/s in the opposite direction. What was the average acceleration of the particle
is the force of friction the same for different angles of incline if all other parameters are equal? explain by
Consider an incompressible fluid inside a closed verticalcylinder. The applied pressure at top of the fluid is 2.02 x10 to the fifth N/m squared, Calculate the pressure at the bottom of the cylinder
the nose of an ultralight plane is pointed south and its airspeed indicator shows 32 . the plane is in a 14 wind
A camper hangs a 26 kg pack between twotrees, using two separate pieces of rope of different lengths. It hangs from one at 71degrees on theleft and from the one on the right side 28degrees. What is the tension in each rope?
the new river gorge bridge in west virginia is a 518 m long steel arch. how much will its length change between
Three equal positive point charges of magnitude Q = 6.00? C are located at three corners of a square of edge length d = 2.9 cm. A negative charge -18.00? C is placed on the fourth corner.
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