Relative to waiting line models: a. What is meant by the terms single-channel system and multiple-channel system? If a crew offour workers operates as a team in servicing a customer, how many chan- nels does the system have? b. Contrast the terms service timeand service rate. Explain how one can convert from time to rate. Why is this important? c. Explain the terms calling population, infinite source, and finite source. d. How does the phrase first-come, first-served apply in waiting line? Which models described in the chapter assume this?

Obtain how many revolutions per second does electron make : In a simple model of the hydrogen atom, the electron moves in a circular orbit of radius 0.053 nm around a stationary proton. How many revolutions per second does the electron make |

Escapes from the asteroid into heliocentric orbit : A baseball pitcher can throw a fastball at a speed of ~150 km/hr. what is the largest size spherical asteriod of density p = 3 g cm^-3 from which he can throw the ball fast enough that it: a) escapes from the asteroid into heliocentric orbit? |

What factor does its weight change : At a certain distance from the center of the Earth, a 4.0- object has a weight of 3.0 . If the object is now moved twice as far from the Earth, by what factor does its weight change? |

Evaluate the torque on the door : A man applies a force of F = 3.00 102 N at an angle of 60.0° to a door, x = 1.90 m from the hinges. Find the torque on the door |

Relative to waiting line models-single-channel system : Relative to waiting line models: a. What is meant by the terms single-channel system and multiple-channel system? If a crew offour workers operates as a team in servicing a customer, how many chan- nels does the system have? |

Evaluate what is the magnitude of the torque : A person exerts a force of 68N on the end of a door 75cm wide. What is the magnitude of the torque if the force is exerted perpendicular to the door |

What is the final temperature of the water–horseshoe system : A 1.50-kg iron horseshoe initially at 670°C is dropped into a bucket containing 22.0 kg of water at 26.0°C. What is the final temperature of the water–horseshoe system? Ignore the heat capacity of the container and assume a negligible amount of water.. |

Compute how much more time is required for it to stop : The tires of a car make 55 revolutions as the car reduces its speed uniformly from 86km/h to 50km/h . The tires have a diameter of 0.90m. how much more time is required for it to stop |

What is the launch speed of a projectile : What is the launch speed of a projectile that rises vertically above the Earth to an altitude equal to 14 before coming to rest momentarily? answer in m/s. |

## Find the magnitude of the resulting magnetic fieldA sphere of radius R is uniformly charged to a total charge of Q. It is made to spin about an axis that passes through its center with an angular speed ω. Find the magnitude of the resulting magnetic field at the center of the sphere. |

## Find the equivalent resistanceA resistor is in the shape of a cube, with each side of resistance R . Find the equivalent resistance between any two of its adjacent corners. |

## What is the electric field at the locationQuestion: Field and force with three charges? What is the electric field at the location of Q1, due to Q 2 ? |

## What is the maximum displacement of the bridge deckWhat is the maximum displacement of the bridge deck? |

## What is the magnitude of the current in the wireWhat is the magnitude of the current in the wire as a function of time? |

## Introductory mechanics: dynamicsCalculate the smallest coefficient of static friction necessary for mass A to remain stationary. |

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