a 10,000kg railroad car is traveling with an initial speed of 24.0 m/s when it strikes an identical railroad car that is initially at rest. as a result of the collision the cars coupled together. what is initial speed of the coupled cars and how much original kinetic energy was lost in this collision? what are some sources of lost of energy of motion.

Calculate how deep is the lake : A spherical bubble rises from the bottom of a lake whose temperature is 5?C at the bottom and 28?C at the surface. how deep is the lake |

Determine the acceleration of the electron : An electron moves through a uniform electric field = (2.30 + 4.90) V/m and a uniform magnetic field = 0.400 T. Determine the acceleration of the electron when it has a velocity = 12.0 m/s. ax = m/s2 ay = m/s2 az = m/s2 |

Estimate what is its change in length : A steel section of the Alaskan pipeline had a length of 67.6 m and a temperature of 16.1?C when it was installed. What is its change in length |

Find what is the intensity delivered to the eardrum : A person wears a hearing aid that uniformly increases the sound level of all audible frequencies of sound by 35.7 dB. What is the intensity delivered to the eardrum |

How much original kinetic energy was lost : a 10,000kg railroad car is traveling with an initial speed of 24.0 m/s when it strikes an identical railroad car that is initially at rest. how much original kinetic energy was lost in this collision |

What is the maximum height h to which the block will swing : A 2.0 kg ball is thrown at the suspended 29.4 kg block with a velocity of 3.5 m/s. The coefficient of restitution between the ball and the block is e = 0.69. What is the maximum height h to which the block will swing? (mm) |

Fraction of the initial kinetic energy transferred : A 5.00 g object moving to the right at 20 cm/s makes an elastic head on collision with a 10.0 g object that is initially at rest. Find (a) velocity of each object after the collision and (b) the fraction of the initial kinetic energy transferred to t.. |

Calculate is the image real or virtual : A concave spherical mirror has a radius of curvature of magnitude 27.4 cm. determine Is the image real or virtual |

Finger need to be placed to balance the meter stick : You would like to balance a meter stick on your finger. The meter stick has a mass of m = 0.2 kg. (a) How far from the end should you place your finger to balance the stick? (b) Suppose two additional masses of M = 0.1 kg are placed at the positions .. |

## 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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