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 ratio of the given heat to that of the silver bar. The thermal conduc- tivity of silver is 427 W/m · ? C. (Silver is the best heat conductor of all metals.)

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? |

In a double-slit experiment-second-order bright fringe : In a double-slit experiment, the second-order bright fringe is observed at an angle of 0.62°. If the slit separation is 0.10 mm, then what is the wavelength of the light? I'm getting 5.4104e-6 nm? But I'm not sure what I'm doing wrong. I've tried it .. |

What is the ratio of the radii of their orbits : A 3.00*10^2-eV electron and a 1.00*10^2-eV electron trapped in a uniform magnetic field move in circular paths in a plane perpendicular to the magnetic field. What is the ratio of the radii of their orbits? |

## How long ago did this individual dieMaterial found with a mummy in the arid highlands of southern Peru has a 164C activity/g of Carbon that is 78.5% of the activity present initially. How long ago (in years) did this individual die |

## What is the contact area between each tire and the groundThe four tires on the author's car are inflated to an absolute pressure of 2.8 multiply.gif 105 Pa.what is the contact area between each tire and the ground |

## How many fringe-pairs will shift byIf the refractive index of air is 1.00029 and all the air is pumped out of the cell, how many fringe-pairs will shift by |

## Find the minimum uncertainty in the speed of the electronAn electron is located on a pinpoint having a diameter of 6.29 µm. What is the minimum uncertainty in the speed of the electron |

## Find the muzzle velocity of the projectileYou have a ballistic pendulum. At the end of the event, the angle of the pendulum is ? with the length of the pendulum being L. Find the muzzle velocity of the projectile |

## Estimate how far does it travel in that timeAn automobile accelerates from rest for 20s with a constant acceleration of 1.5 m/s^2. What is its final velocity? How far does it travel in that time |

## Find how far will the spring compress in stopping the boxA 2kg box slides along a frictionless surface with a speed of 15m/s and approaches a horizontal spring with a spring constant of 2000N/m. If one end is fixed, How far will the spring compress in stopping the box |

## Find the speed of the mass when at its lowest pointThe pendulum of a regulator clock consists of a mass of .12kg at the end of a massless wooden stick of length .44m. What is the speed of the mass when at its lowest point |

## Find the rate of change of density of the air in the tankA tank of 0.5 m3 volume contains compressed air. A valve is opened and air escapes with a velocity of 220 m/s through an opening of 100 mm2 area. Find the rate of change of density of the air in the tank at this moment |

## Determine the acceleration of the alcohol filled shellA thin spherical shell of mass 0.300 kg and diameter 0.190 m is filled with alcohol. It is then released from rest on the bottom of a pool of water. Find the acceleration of the alcohol filled shell as it rises toward the surface of the water. |

## At what position is the third bead in equilibriumTwo small beads having positive charges 18q and q are fixed at the opposite ends of a horizontal insulating rod, extending from the origin (the location of the larger charge) to the point x = d. As, a third small charged bead is free to slide on t.. |

## What is the vertical support force at each endA uniform steel beam has a mass of 720kg On it is resting half of an identical beam, What is the vertical support force at each end |

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