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An electric power station is producing 1.2e3 W of power that is to be sent to a small town located 12 km away. Each of the two wires that comprise the transmission line has a resistance per kilometer of length of 5e-2 Ohms /km. Find the power lost in heating the wires if the voltage is steped up from 140 V to 1300 V using an ideal transformer.
Nitrogen at 5 X 10^5 Pa and 80 degrees C is on one side of a partition, occupying 1/3 of the volume of a 1.2 m^3 container. find the final pressure and temprature
Both systems start from rest, and the direction of the force moves with the system and always points along the 4.00 m rod. What is the angular velocity of each system after 5.28 s.
In a proton linear accelerator, a 8.4mA proton current hits a target. How many protons hit the target each second
Suppose that you want to take a photograph of yourself as you look at your image in a mirror 3.1m away, For what distance should the camera lens be focused
A cable 24 m long and 1.5 mm radius is stretched by a force of 550 N. If the length after stretching is 24.05 m, what is Young's modulus for the cable
A speed skater moving across frictionless ice at 8.4 m/ s hits a 5.2 m -wide patch of rough ice. She slows steadily, after that continues on at 6.3 m/s.
A tank holds a layer of oil, of thickness To = 1.43 m, that floats on a layer of syrup of thickness Ts = 0.640 m, What is the index of refraction of the oil
A 20.0g ball of clay traveling east at 8.00m/scollides and sticks together with a 20.0g ball of clay traveling north at 8.00m/s. What is the speed of the resulting ball of clay
Calculate the energy of the electron in the ground state of triple ionized beryllium, which has an atomic number Z = 4
A car travelling at 105 strikes a tree. The front end of the car compresses and the driver comes to rest after travelling 0.85. What was the magnitude of an average acceleration of the driver during the collision? State the answer in terms of "'s,..
Light from a He-Ne laser (= 632.8) strikes a pair of slits at normal incidence, forming a double-slit interference pattern on a screen located 1.10 from the slits. The figure shows the interference pattern observed on the screen.
A 30-g bullet initially traveling 500 m/s penetrates 12 cm into a wooden block. What average force does it exert on the block
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