A vacuum cleaner is connected to a 120V socket and uses 3.0 A when the back emf generated by the electric motor is 72 volts. What is the resistance of the coil in the motor?

Find the net external force acting on the system : A system consists of two particles. At = 0 one particle is at the origin; the other, which has a mass of 0.50 , is on the -axis at = 6.0. At = 0 the center of mass of the system is on the -axis at = 2.4. The velocity of the center of mass is given.. |

What is the voltage of an alternator that produces a current : What is the voltage of an alternator that produces a current of 0.039 A if it contains a series RCL circuit with a resistance of 300 ohm, an inductive reactance of 650 ohm and a capacitive reactance of 420 ohm? |

What is the voltage of the alternator : A series RCL circuit includes a resistance of 298 ohm, an inductive reactance of 649 ohm, and a capacitive reactance of 415 ohm. The current in the circuit is 0.317 A. What is the voltage of the alternator? |

Find total charge on plates and voltage across all capacitor : Find the equivalent capacitance of a 4 uF , 6uF and 8uF capacitor connected in parallel that has a 12 volt battery connected in series with the parallel capacitors. Also, find the total charge on the plates and the voltage across each capacitor. |

What is the resistance of the coil in the motor : A vacuum cleaner is connected to a 120V socket and uses 3.0 A when the back emf generated by the electric motor is 72 volts. What is the resistance of the coil in the motor? |

What is the cars speed after the loading is completed : An open train car, with a mass of 2130 kg, coasts along a horizontal track at the speed 2.41 m/s. The car passes under a loading chute and, as it does so, gravel falls vertically into it for 2.59 s at the rate of 489 kg/s. What is the car\'s speed af.. |

Compare this performance with heat transfer of solid silver : A pipe 0.0178 m in diameter and 0.16 m long can transfer 3726 J of heat per second with a temperature difference across the ends of 5?C. Compare this performance with the heat transfer of a solid silver bar of the same di- mensions by finding the rat.. |

Describe the part of the electron while in magnetic field : A electron enters a magnetic field of 0.3 T at an angle of 45 degrees and with a speed of 5 E5 m/s. Find the force on the electron . Describe the part of the electron while in the magnetic field. |

What is the resistance of the platinum wire : Two wires are identical, except that one is silver (resistivity = 1.59×10-8 ?·m) and the other is platinum (resistivity = 1.06×10-7 ?·m). The silver wire has resistance of 1.56 m?. What is the resistance of the platinum wire? |

## How thick is the membraneThe magnitude of the electric field across an axon membrane with the resting potential of -71.0 mV is 6.39e+06 V/m. How thick is the membrane |

## At what other angles is constructive interference heardTwo sound sources driven in phase by the equal amplifier are d = 4 m apart on the y axis. At a point a very large distance from the y axis, constructive interference is first heard at an angle θ1 = 0.140 rad with the x axis. |

## Find the frequency of the siren perceived by the observerAn ambulance is generating a siren sound at a frequency of 2,400 Hz. The velocity of sound is 345.0 m/s. find the frequency of the siren perceived by the observer |

## Optical and acoustic branches of the vibration spectrumA model of the stretching vibrations of a polyethylene chain may be made by considering a linear chain of identical masses M connected by springs of alternating force constants C1 and C2. Calculate the characteristic frequencies of such a chain is th.. |

## Explain the various transfers of energy that take placeA person with perfect pitch sits on a bus bench listening to the 445 Hz horn of an approaching car. If the person detects the frequency of 488 Hz, how fast is the car moving. |

## Calculate the potential as a function of rConsider a solid conducting sphere surrounded by a concentric hollowed out sphere with a definite thickness, Then calculate the potential as a function of r |

## What is the speed of the players just after their collisionAn 81 kg running back moving at 4.0 m/s makes a perfectly inelastic collision with a 105 kg linebacker who is initially at rest. What is the speed of the players just after their collision |

## Estimate the capacitance of the capacitora 100v dc battery, a resistor and a capacitor are connected in series. The capacitor is initially uncharged. estimate the capacitance of the capacitor |

## What distance must the airbag stopAutomobile Airbags. The human body can survive an acceleration trauma incident (sudden stop) if the magnitude of acceleration is less than 250m/s2. |

## What is the mass of the coal the barge is carrying downriverA barge on the Ohio river is 35 ft wide and 200 ft long with walls which are 12 ft high. What is the mass of the coal the barge is carrying downriver |

## What is the mass of the object on the moonA 10kg object is brought to the moon, where the acceleration due to gravity is only one-sixth of that on earth. What is the mass of the object on the moon |

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