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 electrons per unit length are on the wire? (The charge of an electron is 1.602 10-19 C.) electrons per meter

How fast is the center of mass of the two-stone system : A stone is dropped at t = 0. A second stone, with 6 times the mass of the first, is dropped from the same point at t = 160 ms. (a) How far below the release point is the center of mass of the two stones at t = 300 ms? (Neither stone has yet reached t.. |

Whats the period of the resulting oscillations : A spring (k = 60.5 N/m) hangs vertically with its top end fixed. a mass attached to the bottom of the spring then displace it 0.225 m. establishing a new equilibrium. If the mass is further displaced and then released, what's the period of the result.. |

Work-energy theorem to find his speed at the top of the ramp : A physics professor is pushed up a ramp inclined upward at an angle 31.0 above the horizontal as he sits in his desk chair that slides on frictionless rollers. The combined mass of the professor and chair is 90.0 . He is pushed a distance 2.85along t.. |

Find the capacitance of the capacitor in nanofarads : A 18.0 k? resistor and a capacitor are connected in series and then a 12.0 V potential difference is suddenly applied across them. The potential difference across the capacitor rises to 8.76 V in 1.22 µs. (a) Calculate the time constant of the circui.. |

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.. |

## Determine how fast will the disk be turningA playground merry-go-round has a disk-shaped platform that rotates with negligible friction about a vertical axis. how fast will the disk be turning |

## Determine the speed and mass of the objectan object has a kinetic energy of 312 J and a momentum of magnitude 20.3 kg × m / s 1, find the speed of the object |

## Calculate how far from the lens is the objectAn object is placed to the left of a lens, and a real image is formed to the right of the lens. How far from the lens is the object |

## What is the resistance of each deviceAn 1800W toaster, a 1.3kW electric frying pan, and a 120 W lamp are plugged into the same 35A, 140V circuit. what is the resistance of each device |

## Estimate the original frequency of the untuned stringA piano tuner sounds two strings simultaneously. One has been previously tuned to vibrate at 287.0 Hz. The tuner hears 2.0 beats per second. What was the original frequency of the untuned string |

## How many penguins of mass can stand on the ice blockA rectangular block of ice 12 m on each side and 1.3 m thick floats in sea water. The density of the sea water is 1025-kg/m3. The density of ice is 917 kg/m3. How many penguins of mass 26 kg each can stand on the ice block before they get their fe.. |

## Find the ratio of the masses of the particlesTwo particles are moving along the x axis. Particle 1 has a mass m1 and a velocity v1 = +3.7 m/s. Find the ratio m1/m2 of the masses of the particles |

## What are the coordinates of the center of the circular pathA particle moves horizontally in uniform circular motion, over a horizontal xy plane, What are the coordinates of the center of the circular path |

## How far in the horizontal direction did it travelIf an object is projected upward with a velocity of 7.3 m/s at an angle of 25 degrees, how far in the horizontal direction did it travel |

## What is the period of oscillationsA circular disk with the rectangular hole has a radius of 0.540 m and mass of 0.440 kg. It is suspended by a point on its perimeter. The moment of inertia about this point is I_p = 1.7×10-1 kgm2. |

## Calculate the total mass of the rodThe density of a 2.39-m long rod can be described by the linear density function ?(x) = 107 g/m + 11.9x g/m2, Determine the total mass of the rod |

## Estimate her upward accelerationAn "extreme" pogo stick utilizes a spring whose uncompressed length is 48 and whose force constant is 1.1×104. Calculate her upward acceleration, in g's at that moment |

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