You're carrying a 3.6m long, 25kg pole to a construction site when you decide to stop for rest. You place one end of the pole on a fence post and hold the other end of the pole 35cm from its tip. Explain how much force must you exert to keep the pole motionless and horizontal?

## Decides to "work off" the excess by jumping up and downA 76kg student consumes 2500 Cal each day and stays the same weight. One day, he eats 3500 Cal and, wanting to keep from gaining weight, decides to "work off" the excess by jumping up and down. |

## The overhead view is approximately to scaleYou are driving home from school steadily at 94 km/h for 150 km. It then begins to rain and you slow to 63 km/h. You arrive home after driving 3 hours and 30 minutes. How far your hometown from school and what is was your average speed. |

## Define the minimum distance in which the car will stopIf the coefficient of friction between road and tires on a rainy day is 0.100, what is the minimum distance in which the car will stop? |

## Which laser emits the higher frequencyTwo automobiles, each of mass 900 kg, are moving at the same speed, 15 m/s, when they have an inelastic collision.(a) In what direction and at what velocity does the wreckage move if one car was driving north and one south? (b) In what direction a.. |

## Find different particle with an electric chargeassume the roller coaster (h1 = 37 m, h2 = 13 m, h3 = 30) passes point A with a speed of 3.10 m/s. If the average force of friction is equal to one third of its weight, with what speed will it reach point B? The distance traveled is 55.0 m. |

## Describe an experiment to measure the molecular weightDescribe an experiment to measure the molecular weight Mw and the second viral coefficient B of a macromolecules in solution using osmotic pressur. Show how you would plot the experimental data. |

## What is the spring constant of each springWhat is the spring constant of each spring if the empty car bounces up and down 1.4 times each second? |

## Which was once the largest office building in the worldTwo point charges, Q1 = -7 and Q2 = 2 are located between two oppositely charged parallel plates. The two charges are separated by a distance of x = 0.33m. Assume that the electric field produced by the charged plates is uniform and equal to E = 6.. |

## What is the thermal energy of gas500 J of work are completed to compress the gas while, in the same process, 1400 J of heat energy are transferred from the gas to the environment. Afterward, what is the rms speed of the molecules. |

## What is the positive or negative acceleration of the busAssume we have an infinitely long wire carrying a current of 2-A. It is bent into an L-shape extending into positive infinities along the x- and y- axes. Find out the magnitude of the magnetic field at a point P with coordinates (0.3 m, 0.3 m). |

## What is the potential difference between starting pointOn planet Tehar, the free-fall acceleration is the identical as that on Earth, but there is also a strong downward electric field that is uniform close to the planet's surface. |

## What is the change in entropy for the systemWhat is the change in entropy for the system. How much force must be applied to climb the hill at the same speed and same air resistance. |

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