Two rocket ships travel in the same direction with a relative speed of .98c. a light pulse is fired from the back of one of the ships to the front of the same ship of length deltaX=20m. a) how much time, deltaT, does it take for the pulse to reach the front of the ship on which it was fired? b) what is the distance traveled deltaX' and the time deltaT' as viewed from someone on the other rocket ship?

## How much does the mass of the rod increase byA plastic rod is rubbed with a cloth, and in the process it acquires a charge of ?2.1×10E?8C. How much does the mass of the rod increase by |

## What are the speed and direction of the first ballOne billiard ball is shot east at 3.0 m/s. A second, identical billiard ball is shot west at 1.0 m/s. What are the speed and direction of the first ball after the collision |

## Find the centripetal acceleration of the ballA ball on the end of a string is whirled around in a horizontal circle of radius 0.326 m. The plane of the circle is 1.1 m above the ground. Find the centripetal acceleration of the ball during its circular motion |

## Estimate the force exerted by the seat on the childA 38.0-kg child swings in a swing supported by two chains, each 3.08 m long. The tension in each chain at the lowest point is 426 N. Find the force exerted by the seat on the child at the lowest point |

## How much energy is required to boost it to the new orbitThe space shuttle is in a 400km - high circular orbit. It needs to reach a 700 km -high circular orbit to catch the Hubble Space Telescope for repairs. how much energy is required to boost it to the new orbit |

## Find the charge on the dust particleA small piece of dust of mass m = 1.0 µg travels through an electric air cleaner in which the electric field is 500 N/C, What is the charge on the dust particle |

## What is the tangential speed of the puckAn air hockey puck is attached to a string with a length of .45 m and is set in a circular motion with a period of 2.0 s. What is the tangential speed of the puck |

## What is electric field at the midpoint between two chargesTwo point charges have a value of 30 ?C each and are 4 cm apart. What is electric field at the midpoint between the two charges |

## What average force did the target exert on the arrowA young boy swings a yo-yo horizontally above his head at an angular acceleration of 0.32 rad/s^2. If the tangential acceleration of the yo-yo at the end of the string is 0.15 m/s^2, how long is string. |

## What is the impulse exerted on peterPeter, a 100kg basketball player, lands on his feet after completing a slam dunk and then immediately jumps up again to celebrate his basket. What is the impulse exerted on Peter during this 0.50s |

## What is the area of the circular coilA 10 turn square coil of area 0.036m squared and a 20-turn circular coil are both placed perpendicular to the same changing magnetic field. What is the area of the circular coil |

## What maximum overhang is possible for the two bricksTwo identical uniform bricks of length 26 m are stacked over the edge of a horizontal surface. What maximum overhang is possible for the two bricks (without tipping) |

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