There is a uniform charge distribution of ? = 8.12 10-8 C/m along a thin wire of length L = 5.94 cm. The wire is then curved into a semicircle that is centered about the origin, so the radius of the semicircle is R = L/?. Find the magnitude of the electric field at the center of the semicircle.

An infinitely long charged wire produces an electric field : An infinitely long charged wire produces an electric field of magnitude 1.17 103 N/C at a distance of 46.4 cm perpendicular to the wire. The direction of the electric field is toward the wire. (a) What is the charge distribution? (b) How many electro.. |

Center of a conducting spherical shell : -5-nC point charge is located at the center of a conducting spherical shell. The shell has an inner radius of 2 m, an outer radius of 4 m, and a charge of +6 nC. (Let the radially outward direction be positive.) |

What is the total net charge of the spherical shell : Consider a hollow spherical conductor with total charge +5e. The outer and inner radii are a and b, respectively. (a) Calculate the charge on the sphere's inner and outer surfaces if a charge of -3e is placed at the center of the sphere. (Use the .. |

What is the amplitude of the oscillation : An air-track glider is attached to a spring. The glider is pulled to the right and released from rest at =0 . It then oscillates with a period of 1.50 and a maximum speed of 58.0 . A What is the amplitude of the oscillation? B What is the glider's po.. |

Magnitude of the electric field at the center of semicircle : There is a uniform charge distribution of ? = 8.12 10-8 C/m along a thin wire of length L = 5.94 cm. The wire is then curved into a semicircle that is centered about the origin, so the radius of the semicircle is R = L/?. Find the magnitude of the el.. |

Imagine sitting on a steadily spinning merry-go-round : Imagine sitting on a steadily spinning merry-go-round, neither speeding up nor slowing down. Like all physics students, you have an identical twin, and your twin is sitting on the merry-go-round, but closer to the center than you. Which of you, if ei.. |

Determine the force exerted by air resistance on the bucket : A fire helicopter carries a 520-kg bucket of water at the end of a 20.0-m long cable. Flying back from a fire at a constant speed of 40.0 m/s, the cable makes an angle of 36.0° with respect to the vertical. Determine the force exerted by air resistan.. |

What is the force of friction between the fridge and floor : The coefficients of kinetic and static friction between a 1000 lb refrigerator and flor are .4 and .45. when at rest the refrigerator is pushed with a horizontal force of 300 lb. what is the force of friction between the fridge and the floor? |

Find the frictional force acting on the block : A 3.00-kg block starts from rest at the top of a 33.5° incline and slides 2.00 m down the incline in 1.80 s. (a) Find the acceleration of the block. m/s2 (b) Find the coefficient of kinetic friction between the block and the incline. (c) Find the fri.. |

## Find the current in the external circuitThree 1.50-V cells, each with an internal resistance of 0.0500?, are connected in series to form a battery with a current of 0.850A in each cell. Find the current in the external circuit |

## How much heat is absorbed by the gasIf 1.00 mol of oxygen is heated at constant pressure of 1.00 atm from 10.0°C to 25.0°C. How much heat is absorbed by the gas |

## What power is being expended by the boyA boy pulls his brother on a sled horizontally across all snow-covered field. The coefficient of friction between the snow and the sled is 0.24. what power is being expended by the boy |

## What minimum upward force must you exert on the booksyou are trying to lift a stack of books off the table. the stack of books has a mass of 15 kg. what minimum upward force must you exert on the books |

## What rotation period will provide normal gravityFuture space stations will create an artificial gravity by rotating. What rotation period will provide "normal" gravity |

## How fast is the water level risinga cylindrical water being filled with water at a rate of 4 cubic feet per second. Given that the water 20 ft in diameter how fast is the water level rising |

## Calculate what is the work done by the childA playground merry-go-round has a radius of 4.20 and a moment of inertia of 255, What is the work done by the child |

## Find where will the particle meet the pulsea heavy but uniform rope of length l is suspended from a ceiling .a particle is dropped from the ceiling at the instant when the bottom end is given the jerk. where will the particle meet the pulse |

## What is the maximum altitude the rocket reachesIn an experiment in physics class, a model solid-fueled rocket is fired vertically with an acceleration of 3 m/sec2 for 6 seconds. After that time, What is the maximum altitude the rocket reaches |

## Find the two forces exerted by boltsA 206 n sign hangs from the end of a 3.30 m long bar. find the two forces exerted by bolts A and B |

## How many moles of the substance are presentA certain substance has a mass per mole of 36 g/mol. When 319 J is added as heat to a 35.0 g sample of this material, How many moles of the substance are present |

## What is the radius of the curveA 1663.22 lbs. go-cart and driver rounds a curve. If the centripetal force on the go-cart and driver is 1000 lbs. What is the radius of the curve |

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