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An extension cord made of two wires of diameter 0.129 cm (no. 16 copper wire) and of length 2.4 m (8 ft) is connected to an electric heater which draws 13.5 A on a 120-V line. How much power is dissipated in the cord?
What is the distance between the two traps?
a runoff for a truck consists of aa 500 meter horizontal runway with course gravel to stop the truck. the mass of the
A rider on a 16 m diameter Ferris Wheel is initially at traveling at 10 m/s. The Ferris Wheel slows to rest over two complete revolutions. How long does it take for the ferris wheel to stop
An engine has an efficiency of 63% and produces 6461 J of work. Determine the rejected heat
A 7 kg sled is initially at rest on a horizontal road. The sled is pulled a distance of 3.5 m by a force of 37 N applied to the sled at an angle of 30o to the horizontal
A cart for hauling ore out of a gold mine has a mass of 447 kg, including its load. Calculate the work done on the cart during the process by friction
An astronomer observes a comet and measures the wavelength of the H? line to be at 486.2 nm. In the lab, the line is found to be at 486.1 nm. What is the Lorentz factor for the comet
An electron is in the fifth Bohr orbit of hydrogen. Calculate the time required for the electron to circle the nucleus
An ice-making machine operates in a Carnot cycle. It takes heat from water at 0.0°C and rejects heat to a room at 22.5°C, How much heat is discharged into the room
What is the phase constant of the motion and what are its position and direction of travel at t = 2.00 s, what is the first time when the object is at maximum velocity?
In an X-ray tube electrons strike a tungsten target (W or "wolfram") after being accelerated through a potential difference V0. Estimate the minimum value of V0 required to observe the Kalpha peak.
To keep her dog from running away while she talks to a friend, Susan pulls gently on the dog's leash with a constant force given by F = (2.1 N ) ^x+ (1.5 N )^y, How much work does she do on the dog
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