A particle of mass 0.450 kg is attached to the 100-cm mark of a meter stick of mass 0.125 kg. The meter stick rotates on a frictionless, horizontal table with an angular speed of 2.00 rad/s. (a) Calculate the angular momentum of the system when the stick is pivoted about an axis perpendicular to the table through the 50.0-cm mark. kg · m2/s (b) Calculate the angular momentum of the system when the stick is pivoted about an axis perpendicular to the table through the 0-cm mark. kg · m2/s

Find the final speed of both pucks : Two pucks, A and B, are on an air hockey table. Puck A is moving with an initial velocity of 5.5m/s Eastward and Puck B is at rest and East of Puck A. Find the final speed of both pucks |

Explain the molar solubility in water be the same as hcl : For which of the following substances will the molar solubility in water be the same as that in an HCl or NH3 solution |

Determine what is the efficiency of the solar cell : A solar cell has a light-gathering area of 10 cm2 and produces 0.2 A at 0.8 V (DC) when illuminated with S = 1000 W/m2 sunlight. What is the efficiency of the solar cell |

To decrease the body temperature : To decrease the body temperature of a 66-kg person by 1.0 C , what mass of alcohol must be evaporated from the person's skin? Ignore the heat involved in raising the temperature of alcohol to its boiling point (why?) and approximate the human body as.. |

System when the stick is pivoted about axis perpendicular : A particle of mass 0.450 kg is attached to the 100-cm mark of a meter stick of mass 0.125 kg. The meter stick rotates on a frictionless, horizontal table with an angular speed of 2.00 rad/s. |

Find the work done by the machine : A machine does work at a rate given by Pct^2 , where c = 15W/s^2 and t is time. Find the work done by the machine between 15s and 20s? huh |

What is the speed at the bottom of the hill : a hoop of mass M=2 kg and radius R=0.4 m rolls without slipping down a hill. what is the speed Vfinal at the bottom of the hill |

Find the atoms maximum speed : An atom in a solid vibrates at 10THz with amplitude 10pm. Find the atom's maximum speed |

Explain the sum of the coefficients in the balanced equation : The following reaction occurs in basic solutions. What is the sum of the coefficients in the balanced equation. MnO4- + NH3 ----> NO3- + MnO2 |

## What is the momentum of the protonA magnetic field of 2.00T is applied to a bubble chamber to make the tracts of protons, what is the momentum of the proton |

## How much work is done by the tension in the cableA rescue helicopter lifts a 60 kg person straight up by means of a cable. The person has an upward acceleration of 0.70 m/s2, How much work is done by the tension in the cable |

## What is the distance between these two pointsA loudspeaker at the origin emits a 140Hz tone on a day when the speed of sound is 340 m/s. What is the distance between these two points |

## Calculate the electric field in the wireA copper wire has radius r = 0.424 cm, is 6.00 m long, has resistivity ? = 1.72·10-8 ? m, What is the electric field, E, in the wire |

## How wide is the apertureA point source of light illuminates an aperture 2.00m away. How wide is the aperture |

## What is the corresponding value of force for larger sphereTwo uniform solid spheres have the same mass of 2.15 kg, but one has a radius of 0.213 m while the other has a radius of 0.867 m. What is the corresponding value of F for the larger sphere |

## Calculate the angle between wire and magnetic fieldThe magnetic force per meter on a wire is measured to be only 21% of its maximum possible value |

## Q1 a persons heart and head are 12m and 17m above the feetq1. a persons heart and head are 1.2m and 1.7m above the feet respectively. find out the potential energy associated |

## Determine the initial velocity of the hanging massA string is wound around a metal wheel that is free to spin on a frictionless pivot. A hanging mass is connected to the other end of the string, What is the initial velocity of the hanging mass |

## Determine the specific entropy changeFor ideal gas CO2, it is compressed from an initial state of 120Kpa, 340k to a final state of 900kpa, 1200k. Determine the specific entropy change |

## Question1a 14 g rifle bullet travelling 200 ms buriesquestion1a 14 g rifle bullet travelling 200 ms buries itself in a 3.5 kg pendulum hanging on a 3.3 m extended string |

## What should the bungee cords relaxed lengthA 300 lb bungee jumper wants to jump from the top of a 230 ft high bridge and be able to just touch the water below. what should the bungee cord's relaxed length, l, be for this jump |

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