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The number of turns in the primary and the secondary of a step-up transformer are 93 and 439 respectively. If the input AC voltage is 128V, what is the output voltage of this transformer?
A boat moves through a river at 7-m/s relative to the water, regardless of the boat's direction. If the water in the river is flowing at 3.50m/s, how long does it take boat to make a round trip consisting of a 250 m displacement downstream followe..
A vertical straight wire carrying an upward 21-A current exerts an attractive force per unit length of 8.3×10?4N/m, What is the magnitude of the current in the second wire
Find the capacitance of a parallel plate capacitor that has two square plates both having a side length of 6 cm, where these plates are seperated by 15 mm
A student weighing 800 N crouches on a scale and suddenly springs vertically upward.His roommate notices that the scale reads 900 N, With what acceleration does he leaves the scale
Two blocks are placed in contact on a horizontal frictionless surface. The smaller box has less mass than the larger box. A force F is applied to the small box as shown so that the boxes accelerate to the right.
The height of a helicopter above the ground is given by h = 3.00 t3, where h is in meters and t is in seconds. After 2s, the helicopter releases a small mailbag. How long after its release does the mailbag reach the ground.
A 67 kg person sits on a 3.5kg chair. Each leg of the chair makes contact with the floor in a circle that is 1.8 cm in diam. Determine the pressure exerted on the floor by each leg of the chair; Assume the weight is evenly distributed.
a 600 ton Boeing business jet is flying at 500 mph at a constant altitude of 35,00 ft. if the jet is holding passengers as cargo amounting to a weight of 37 tons, what is the lifting force acting on the jet provided by the air?
A damped mass-spring system oscillates at 280 Hz. The time constant of the system is 2.0 s. At t = 0, the amplitude of oscillation is 8.4 cm and the energy of the oscillating system is then 84 J.
A tank of water 3.00m deep sits on a table 1.00 m tall. A hole is located 2.0m from the bottom of the tank. Water flows out of hole and strikes the ground. Where does it strike the ground.
A 0.390 kg iron horseshoe that is initially at 745 °C is dropped into a bucket containing 24 kg of water at 46 °C. What is the final equilibrium temperature? Overlook any heat transfer to or from the surroundings.
A steel rod is 3 cm in diameter at 25 C. A brass ring has an interior diameter of 2.992 cm at 25 C. At what common temperture will the ring just slide into the rod?
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