Two conductors are made of the same material and have the same length. Conductor A is a solid wire of diameter 1.0 mm. Conductor B is a hollow tube of outside diameter 4.1 mm and inside diameter 3.1 mm. What is the resistance ratio RA/RB , measured between their ends?

## Find the electrical potential at the center of the squareCalculate the electrical potential at the center of the square described as follows: Four charges are placed at the corners of a 20 cm square |

## Compute the roational kinetic energyA uniform disk of mass M=12.0 kg and radius R=.75 m is free to rotate about a frictionless axle through its center. compute the roational kinetic energy |

## What is the velocity of the boat relative to shoreA river flows due east at 1.50 m/s. A boat crosses the river from the south shore to the north shore by maintaining a constant velocity of 15 m/s due north relative to water. |

## Determine the angle through which the bob swingsA pendulum bob with mass of 3.0 kg is suspended from an ideal string a distance of 3.5 m from the ceiling. A 0.004 kg bullet is fired horizontally at a speed of 6.91x103 m/s and imbeds itself in the bob. |

## Find the dimensions of the poster with the smallest areaThe top and bottom margins of a poster are 4 cm and the side margins are each 5 cm. find the dimensions of the poster with the smallest area |

## Calculate the buoyant force on the massAn object with a mass of 27 g displaces 306.6 ml of water when it is completely immersed. What is the buoyant force on the mass |

## What is the maximum possible torque on the dipoleTwo small plastic spheres, one charged to 17nC and the other to -17nC are connected by a 25 mm long insulating rod, What is the maximum possible torque on the dipole |

## Determine how much work is done by the workerA mail bag with a mass of 120 is suspended by a vertical rope of length 8.00. How much work is done by the worker in moving the bag to this position |

## Find the speed of the photo-electronsA metal must absorb radiation with a minimum frequency of 1.94 e15 Hz before it can emit an electron from its surface via the photoelectric effect, find the speed of the photo-electrons |

## At a construction siteAt a construction site, a 23.0 bucket of concrete is connected over a very light frictionless pulley to a 310 box on the roof of a building. (See the figure.) There is no appreciable friction on the box, since it is on roller bearings. The box starts.. |

## Find the total flux through the five non-shaded facesThere is a uniform electric field throughout the region, given (in N/C) by E = 6.1i + 7.5j + 1.8k, What is the total flux through the five non-shaded faces |

## What is the length of the inclined plane6 J of work is needed to push an object of mass 2 kg from point A to point B of the frictionless inclined plane, What is the length s of the inclined plane |

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