Three identical train cars, coupled together, are rolling east at 1.6 m/s . A fourth car traveling east at 4.4 m/s catches up with the three and couples to make a four-car train. A moment later, the train cars hit a fifth car that was at rest on the tracks, and it couples to make a five-car train. What is the speed of the five-car train?

Evaluate the concentrations of all species in a solution : Calculate the concentrations of all species in a 0.100 M H3PO4 solution given the following Ka: 7.5 X 10^-3 for H3PO4^- 6.2 X 10^-8 for H2PO4^- and 4.8 X 10^-13 HPO4^2 |

Compute how fast is dan going as his feet hit the ground : Dan is gliding on his skateboard at 3.0 m/s. He suddenly jumps backward off the skateboard, kicking the skateboard forward at 8.0 m/s. How fast is Dan going as his feet hit the ground |

What force is keeping the car in the circle : A car is moving on a flat horizontal circular track of radius 120 m. The speed of the car is constant, 15m/s. The mass of the car is 1200 kg. What force is keeping the car in the circle |

Explain preparation of chromium complexes : Preparation of chromium complexes such as [Cr(en)3](ClO4)3, the typical starting material is CrCl3 6H2O. When combined with excess ethylenediamine in an appropriate solvent |

Determine the speed of the five-car train : Three identical train cars, coupled together, are rolling east at 1.6 m/s . A fourth car traveling east at 4.4 m/s catches up with the three and couples to make a four-car train. What is the speed of the five-car train |

Interest group theory prespective of regulation : Critically analyse and evaluate the arguments for, and against, for each of the case studies. Which arguments do you consider to be more compelling |

Calculate the predetermined overhead rate : Lu Technology, Co., manufactures CDs and DVDs for computer software and entertainment companies. Lu uses job order costing and has a perpetual inventory system. |

How far up the smooth side will the marble go : A uniform marble rolls down a symmetric bowl, starting from rest at the top of the left side. The top of each side is a distance above the bottom of the bowl. How far up the smooth side will the marble go |

Explain the reaction of crcl3 with liquid nh3 : The reaction of CrCl3 with liquid NH3 to give yellow [Cr(NH3)6]Cl3 often has a low yield, since the reaction tends to stop with the production of pink [Cr(NH3)5Cl]Cl2 |

## 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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