A 4.0-m-long iron bar of uniform cross section is held perpendicular to the wall by a wire from the end of the bar to the wall as shown below. If the iron bar weighs 636 N and the wire is 5.0 m long, what is the magnitude of the vertical component of force produced by the wall?

What is the spring constant of the potential well : An electron confined in a harmonic potential well emits a 1280nm photon as it undergoes a 5 ? 4 quantum jump. What is the spring constant of the potential well |

Monatomic ideal gas along processes : Consider the expansion of 60.0 moles of a monatomic ideal gas along processes 1 and 2 in the figure below. In process 1 the gas is heated at constant volume from an initial pressure of Pi = 95 kPa to a final pressure of Pf = 190 kPa. In process 2 .. |

What is the acceleration of two falling sky divers : What is the acceleration of two falling sky divers (mass 116.0 kg including parachute) when the upward force of air resistance is equal to one-fourth of their weight? n? |

Find velocity of their center of mass before-after collision : A ball of mass 0.206 kg with a velocity of 1.54 m/s meets a ball of mass 0.291 kg with a velocity of -0.396 m/s in a head-on, elastic collision. (a) Find their velocities after the collision. V1f = m/s V2f = m/s (b) Find the velocity of their center .. |

Find the magnitude of the vertical component of force : A 4.0-m-long iron bar of uniform cross section is held perpendicular to the wall by a wire from the end of the bar to the wall as shown below. what is the magnitude of the vertical component of force produced by the wall |

Determine what is the flow speed in this pipe : Water flows at 0.950 m/s from a hot water heater, through a 450-kPa pressure regulator. What's the flow speed in this pipe |

How should the company handle investor relations : Management had to act quickly with a plan to move forward as smoothly as possible. How should the company handle investor relations in order to calm shareholder panic and negative stock price movement? |

A horizontal pipeline-what is oil pressure in the pipeline : A horizontal pipeline carries 10,125 m^3 of oil every hour. Along the pipeline where the radius is 60 cm, the oil pressure is 170 kpa. The density of the oil is 800 kg/m^3. What is the oil's speed in the pipeline where the radius is 60 cm? What is th.. |

Determine how fast does the turntable''s rim move : A cat is sitting on the rim of a wooden turntable that is free to turn about a vertical axis. how fast does the turntable's rim move relative to the ground |

## Find the magnification of the coins final imageA converging lens of focal length 7.550cm is 20.5cm to the left of a diverging lens of focal length -6.50cm, Find the magnification of the coins final image |

## Determine the half-thickness for leadLead shielding. When gamma rays are incident on matter, Determine the "half-thickness" for lead, that is, the thickness of lead that would absorb half the incident gamma rays |

## Explain how much time will it take for the police officerExplain how much time will it take for the police officer to reach the speeder, assuming that the speeder maintains a constant speed? |

## How far does the stone travel horizontallyA stone is thrown with an initial speed of 12 m/s at an angle of 30 degrees above the horizontal from the top edge of a cliff. how far does the stone travel horizontally |

## Q1 a sling-thrower puts a stone 0250 kg in the slings pouchq1. a sling-thrower puts a stone 0.250 kg in the slings pouch 0.010 kg and then begins to make the stone and pouch move |

## What would be the radius of the modelSuppose you want to make a scale model of a hydrogen atom. For the nucleus you choose a small ball bearing with a radius of 1.7 mm, What would be the radius of the model |

## Find the distance does the particle moveThe position of a particle moving along the x axis depends on the time according to x=ct^2-bt^3 where x is in meters, what distance does the particle move and what is its displacement |

## Wishto average 33.6 mphOn a drive from your home to town, you wishto average 33.6 mph. The distance from yourhome to town is 90miles. However, at 45miles(half way), you find you have averaged only25.2 mph. |

## What is the peak value of potential difference across coilA 2.20 H coil with a resistance of 2.18×10^2 ohms is in series with a 1.29×10^3 ohms resistor. What is the peak value of the potential difference across the coil |

## What is the refractive power of a magnifying glassA stamp collector is viewing a stamp with a magnifying glass held next to her eye. What is the refractive power of a magnifying glass that has an angular magnification of 7.9 when the image of the stamp is located at the near point |

## Where would the end of spring line up with the ruler marksA jogger on a circular track that has the radius of 0.150km runs a distance of 1.10km. What angular distance does the jogger covers in radians. |

## How much power must be supplied to the stringA string with a mass of 31 g and a length of 2 m is stretched under a tension of 67 N. How much power must be supplied to the string to generate a traveling wave that has a frequency of 51 Hz and an amplitude of 4 cm? |

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