A 20-mC charge is 4 cm above an unknown charge q. The electric intensity at a point 1 cm above the 20-mC charge is 2.20x109 N/C and is directed upward. What are the magnitude and sign of the unknown charge?

## Find the angle between axes of the polarizer and analyzerA beam of light passes through a polarizer and then an analyzer. find the angle between the axes of the polarizer and the analyzer |

## What power was generatedA pulley system lifts 400N to height of 15 meters in 6 seconds. How much work is done on the object. What power was generated |

## The generation rate for a contaminant is 25 mgmin thethe generation rate for a contaminant is 25 mgmin. the dilution volume flow rate is 4000 cfm. what is the equilibrium |

## What was the bullets flight timeWhat was the bullet's flight time. A marble is thrown horizontally with a speed of 11 m/s from the top of a building. When it strikes the ground, the marble has a speed that makes an angle 38° with the horizontal. From what height above the ground.. |

## What was the change of the systems electric potentialAn electron moves from point A where the potential is Va=+20.0kV to point B where the potential is Vb=- 40.0 kV. what was the change of the system's electric potential |

## Find in which collision is the impulse on the cart greaterA cart traveling at 0.3 m/s collides with stationary object. After the collision, the cart rebounds in the opposite direction. In which collision is the impulse on the cart greater |

## What is the magnitude of the total fluxhat is the magnitude of the total flux through the five non-shaded faces. |

## What is the speed of the diverAn 82.0 kg skydiver jumps out of a balloon at an altitude of 1 280 m and opens the parachute at an altitude of 190 m. what is the speed of the diver when he lands on the ground |

## Determine the height of the hillA child and sled with a combined mass of 42.0 kg slide down a frictionless slope. what is the height of the hill |

## The motion of a projectile fired at t0 it initial speed isthe motion of a projectile fired at t0. it initial speed is 50 ms and its initial projection angle is 45 degree from |

## What fraction of the tensile strength is stress on the femurLarger animals have sturdier bones than smaller animals. A mouse's skeleton is only a few percent of its body weight, compared to 16% for an elephant. what fraction of the tensile strength is the stress on the femur |

## Write an expression for the position of the massA mass of 0.25 kg is attached to a horizontal spring with a spring constant of 4.0 N/m. Write an expression for the position of the mass as a function of time |

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