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An electric power station is producing 1.60 × 103 W of power that is to be sent to a small town located 13 km away. Each of the two wires that comprise the transmission line has a resistance per kilometer of length of 6.50 × 10-2 ?/km. Find the power lost in heating the wires if the voltage is stepped up from 110 V to 1000 V using an ideal transformer in Watts
David is driving a steady 21 m/s when he passes Tina, who is sitting in her car at rest. Tina begins to accelerate at a steady 2.20 m/s^2 at the instant as David passes.
In 1911, Ernest Rutherford and his assistants Geiger and Marsden conducted an experiment in which they scattered alpha particles, What is the smallest distance between the alpha particle and the nucleus before the alpha particle reverses direction
A speedboat starts from rest and accelerates at +2.32 m/s2 for 6.78 s. At the end of this time, the boat continues for the additional 5.34 s with an acceleration of +0.677 m/s2. Following this, the boat accelerates at -0.686 m/s2 for 8.68 s.
A block of the same weight as the meter stick is suspended from the stick, as shown, at a distance x from the wall. What is the minimum value of x for that the stick will remain in equilibrium.
A 2.3 box, starting from rest, is pushed up a ramp by a 10 force parallel to the ramp. The ramp is 2.0long and tilted at 17 . The speed of the box at the top of the ramp is 0.80 .
A luge and its rider, with a total mass of 90 kg, emerge from a downhill track onto a horizontal straight track with an initial speed of 38 m/s. If a force slows them to a stop at a constant rate of 1.4 m/s2.
A steel aircraft carrier is 364m long when moving through the icy North Atlantic at a temperature of 2.4°C. By how much does the carrier lengthen as it is traveling in the warm Mediterranean Sea at a temperature of 21° C.
An automobile with a mass of 940 kg goes around a curve with a radius of 64m.The coefficient of friction between the tires and the road is 0.700. Illustrate what is the maximum speed with which the car can go around the curve ?
What is frequency of the string
A singly charged ion of unknown mass moves in a circle of radius 14.5 cm in a magnetic field of 7.4 T, What is the mass of the ion
An aircraft with a mass of 996 kg accelerates from 0 to 87 m/s in 6.2 seconds, at which time the aircraft launches. What is the kinetic energy of the aircraft when the aircraft launches
1. A modern-day zeppelin holds 8,280 m3 of helium, Compute its maximum payload at sea level
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