Q. A 230 g, 23-cm-diam plastic disk is spun on an axle byout its center by an electric motor. What torque is required to the motor supply to take the disk from 0 to 1800 rpm in 4.60 s?

Q. A 24.00 kg child is on a swing that hangs from 1.6-m long chains. What is her highest speed if she swings out to a 45° angle?

What is the least distance required for the car to stop : A 100kg crate is being pushed across a horizontal floor by a force P that makes an angle of 30 below the horizontal. The coefficient of kinetic friction is 0.20. What must be the magnitude of P, so that the net work completed by it and the kinetic.. |

Antisense technique to prevent allergen gene : Genetically modified almonds to be come allergen-free. What is the step by step mechanism of how to use antisense technique to prevent allergen gene from being express? |

What is the enhancement in temperature of bullet : A flight attendant pulls her 63-N flight bag a distance of 277-m along a level airport floor at a constant velocity. The force she exerts is 35N at an angle of 57° above the horizontal. Determine the work completed by the force of friction on flig.. |

How many cars would you expect to see in the system : How many cars would you expect to see in the system. A toll tunnel has decided to experiment with the use of a debit card for the collection of tolls. Initially, only one lane will be used |

What torque is required to the motor : A 24.00 kg child is on a swing that hangs from 1.6-m long chains. What is her highest speed if she swings out to a 45° angle. |

Find running time of heap sort input sorted-ascending order : Determine the running time of Heap Sort if input is sorted in ascending order. Determine the running time of Heap Sort if input is sorted in descending order. |

Formulate a spreadsheet model that will give the profit : Formulate a spreadsheet model that will give the profit in part b for any of the two numbers. Use the Excel goal seek command to calculate the break-even point found in part a. |

Question about molecular biology : Assume you infected an E. coli culture with a virulent bacteriophage. Most of the cells lysed, but a few survived - 1x10^-4. You wonder where the resistant bacteria came from. |

Determine the amount by which the spring is stretched : A 9.10 kg board is wedged into a corner and held by a spring at a 50° angle, as the Illustrating shows. The spring has a spring constant of 196 N/m and is parallel to the floor. |

## How much work is completed by the workerA 110 kg mail bag hangs by a vertical rope 4.0 m long. A postal worker then displaces the bag to a position 2.0 m sideways from its original position, always keeping the rope taut. As the bag is moved to this position, how much work is completed by t.. |

## What fraction of the initial kinetic energy was transferredWhat fraction of the initial kinetic energy was transferred |

## Establish the moment of inertia of this arrangementImagine that we drop a block of mass m from a height h above the comparatively lightweight plate supported by a vertical spring with relaxed length L and spring constant k. From what value of h would we have to drop the block to compress spring to.. |

## What is the average velocity of the water in the pipeOne liter of water is 41C is used to make iced tea. How much ice at 0 C must be added to lower the temperature of the tea to 17C? The specific heat of water is 1 cal/g C and latent heat of ice is 79.7 cal/g. Reply in units of g. |

## What is the half life of isotopeA small fly of mass 0.27 grams is caught in a spider's web. The web vibrates predominately with a frequency of 4.50 Hertz. What is the value of the effective spring constant stiffness constant for the web. |

## How much work was done by friction on meganTwo horizontal forces, 249 N and 165 N, are exerted in opposite directions on a crate. What is the net horizontal force on the create? Be sure to point to the direction of the net force. |

## How two charged dust particles exert a forceA diving board of length 3.00m is supported at a point 1m from the end, and a diver weighing 520 m stands at the free end . The diving board is of uniform cross section and weighs 270m. |

## How high is the fenceA paperweight, when weighed in air, has a weight of W = 7.4N. When completely immersed in water, though, it has a weight of Win water = 4.40 N. Find the volume of the paperweight. |

## The coefficient of volume expansion of coffeeThe coefficient of volume expansion of coffee is the same as that of water. How much coffee (in cubic meters) has spilled out of the beaker. |

## How fast the air flow over the upper surface of the winghow fast the air flow over the upper surface of the wing. What is the coefficient of kinetic friction between the box and the floor. |

## At what distance below the faucet has the water streamIf a person radiates about 65.00 W of power at room temperature, how long does it take for a person to radiate away the energy acquired by consuming a 230 Calorie donut. |

## What is the speed of the runner at the end of the raceA handball of mass 0.10 kg, traveling horizontally at 25 m/s, strikes a wall and rebounds at 19m/s. What is the change in the momentum of the ball. |

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