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Power transmission lines often use a form of electric current called alternating current, but in many regions, such as the Province of Quebec, high-voltage direct-current lines are used instead. Direct current is the kind of electric current you are studying in this chapter. A certain direct-current power transmission line has a resistance of 0.255 ?/km. 812 kV of potential drives the current from the generating station to a city located 125 km from the plant. What is the power loss due to resistance in the line?
A car moving at 10 m/s crashes into a barrier and stops in 0.50s. There is a 20kg child in the car. Suppose that the child's velocity is changed by the same amount as the cars in the same time period.
An object is dropped from a height of 55 m above ground level. Determine the final speed at which the object hits the ground
A car traveling at 24 m/s runs out of gas while traveling up a 9 degree slope. How far will it coast before starting to roll back down.
A parallel-plate capacitor with 2.0 mm plate spacing has circular plates and holds a charge of +/- 3uC on each plate, What is the radius of the plates
A 5.00-g bullet, traveling horizontally with a velocity of magnitude 360 m/s, is fired into a wooden block with mass 0.800 kg, initially at rest on a level surface. What is the decrease in kinetic energy of the bullet
A hiker's trip consists of three segments. Path A is 8km long heading 65 degrees north of east. Path B is 7km long in a direction due east. Path C is 4.0 km long heading 313 degrees counter clockwise from east.
A tile is dropped at a height of 12 Meters. The tile has a mass of 2.5kg. Calculate the final speed of the tile
An iron tower in is 307 meters tall on a cold day (T = -8.3 degrees Celsius). What is its height of the tower on a hot day
A crate with mass 36.0 initially at rest on a warehouse floor is acted on by a net horizontal force of 142. Explain how far does it travel in 12s and what is its speed at that time?
A generator connected to an RLC circuit has an rms voltage of 120V and an rms current of 34mA. what is the inductive reactance of the circuit
if you decrease the hanging mass by a factor of four( 0.55 kg/4) but keep the linear mass density the same, by what factor does the fundamental frequency change
In a T1 PCM-TDM system, 24 signals all with the same bandwidth of 4 kHz are multiplexed after sampling at their Nyquist rate. If an 8-bit ADC is employed in this T-carrier system, find the speed of the digital multiplexed line.
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