an electron in a hydrogen makes a transition between levels and emits a photon with a frequency of 6.91*10^14 hz. The frequency is in the visible range

a) is the electron jumping to higher or lower level?

b) find the n values of levels?

What is the bright fringe separation : a double-slit arrangment prduce bright interference fringrs that are seprated by 2.60 mm when the wavelengt is 589nm. what is the bright fringe separation |

Units of elephants produced sold for $2,000 per unit and the : Country A produces two goods, elephants and saddles. In the year 2006, the 10 units of elephants produced sold for $2,000 per unit and the 25 units of saddles produced sold for $200 per unit. |

Determine the aeration period and f by m ratio : Two activated sludge aeration tanks in Podunk, MO are operated in series. Each tank has the follwing dimensions: 7.0 m wide x 28.0 m long x 3.5 m effective liquid depth. |

Estimate the bending moment at the base of the chimney : A cylindrical chimney,1 m in diameter and 2.5 m tall is exosed to a uniform 50km/hr wind at standard atmospheric conditions.End effects and gusts may be neglected. |

Find is the electron jumping to higher or lower level : an electron in a hydrogen makes a transition between levels and emits a photon with a frequency of 6.91*10^14 hz . find is the electron jumping to higher or lower level |

Set up the problem and constraints using algebraic symbols : Two factories are manufacturing and supplying a single type of good to four warehouses. The factories can produce a1, and a2 units of the good each month, and the warehouses need b1, b2, b3, and b4 units each month |

Merit system principles and prohibited personnel practices : Merit system principles and prohibited personnel practices are actually fairly complicated to understand and far from obvious in their logical restrictions. Depending on one's government affiliation either as a local, or federal worker, there are a v.. |

Compute the kinetic energy of the alpha particle : The isotope 226 Ra Alpha decays. its measured atomic mass is 226.02541 amu, the daughter nucleus has a mass of 222.01758 amu and helium has atomic mass 4.0026 amu. calculate the kinetic energy of the alpha particle |

Determine the required mass of c and the length of the cable : if D has a mass of 600 kg, determine the required mass of C, the maximum sag h of the cable, and the length of the cable between the pulleys A and B. The Beam has a mass per unit length of 50 kg/m. |

## Find the half life of the sampleA sample contains 8.90×104 radioactive nuclei. In a time of 5 minutes, 1.90×103 of the nuclei decay. Evaluate the half life of the sample |

## What is an image distanceA lens placed at the origin with its axis pointing all along the x axis produces a real inverted image at x=-24cm that is twice as tall as the object. What is an image distance. |

## What is the highest compression of the springA tuning fork vibrating at 666 Hz falls from rest and accelerates at 9.8 m/s 2. How far below point of release is the tuning fork when waves of frequency 626.4 Hz reach the release point? The speed of sound in air is 339 m/s. |

## How far the drop will the rock hit the groundHow far from the point of the drop will the rock hit the ground. |

## Compute the electric field at the center of the square arrayStarting from the top left corner and moving clockwise the charges are -10 uC, -10 uC, 5 uC, and 5 uC. What is the electric field at the center of the square array of charges |

## What is the mass of the heaviest rockOne day when you come into physics lab you find several plastic hemispheres floating like boats in a tank of fresh water. What is the mass of the heaviest rock that, in perfectly still water, won't sink the plastic boat |

## How fast are the boys and the sled movingA physics student has designed a winter game. He has a platform 4.6 meters high with a rope tied to a tree at the same height, how fast are the boys and the sled moving after they "collide" |

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## What is the inductance of the inductor in millihenrysConsider a series RLC circuit where R = 549 ? and C = 1.25 ?F. However, the inductance L of the inductor is unknown. To find its value, What is the inductance of the inductor in millihenrys |

## What is the magnitude of its displacement from launch pointA 62.00kg student is standing atop a spring in an elevator that is accelerating upward at 3.8 m/s2. The spring constant is 2600-N/m. By how much is the spring compressed. |

## What is the magnitude of the external electric fieldDrawing on Eratoshthenes' method, if two observers are due north and south of each other and are separated by 400 km, what is circumference of their spherical world if they see the similar star on their meridian at altitudes of 23degrees and 47deg.. |

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