Calculate the wavelength of light emitted by a hydrogen atom when an electron makes a transition from n=8 to n=2 levels.

## By what factor the force changes between themConsider two planets in space that gravitationally attract each other. If the mass of one planet is increased six-fold, then the force between them changes by what factor |

## Compute how far above that position the center of mass risesA thin rod of length 0.72 m and mass 200 g is suspended freely from one end. It is pulled to one side and then allowed to swing like a pendulum, how far above that position the center of mass rises |

## Determine the minimum weight an astronaut would haveAs astronauts travel between the Earth and the moon, their mass remains constant, but their weight diminishes. Determine the minimum weight an astronaut would have |

## Evaluate the electric field at the center of the squareThe particles are as follows: 10 uC at x = 0, y = 0; -5 uC at x = 20, y = 0; -15 uC at x = 20, y = 20; What is the electric field at the center of the square |

## What is the density of the tinA piece of tin has a mass of 25g and a volume of 4.3cm^3 a)what is the mass of 1 cm^3 b) what is the volume of 1g of tin c) what is the density of the tin d) what is the mass of 34cm^3 of the same type of tin e) what is the volume of 130g of the s.. |

## What is the friction force of the waterone of your classmate has a friend with a boat. here is your classmate on water-skis being towed. in the absence of friction your classmate (m=62kg) would accelerate at 2.23m/s^2. |

## What is the final velocity vector of the ballImagine that the cannon from Problem #1 is actually firing into a strong wind, What is the final velocity vector of the ball when it lands |

## What amplitude of simple harmonic motion of the springA wheel 90.0 cm in diameter accelerates uniformly from 235 rpm to 385 rpm in 6s. How far will a point on the edge of the wheel have travelled in this time. |

## Find the velocity of the police carA speeding motorist traveling with velocity Vm is spotted by a police car.find The velocity of the police car when it catches up to the motorist |

## Determine the induced emf as the time of originA loop of 50 turns and 40cm^(2) rotates with angular velocity of 300 turns per minute normal to a magnetic field of 0.5 T |

## Find the total power delivered to combination of resistorThree 100 ? resistors are connected as shown in the figure. The maximum power that can safely be delivered to any one resistor is 21.5 W. find the total power delivered to the combination of resistors |

## Find the average translational kinetic energy per atomThe atmosphere of the sun consists mostly of hydrogen atoms (not molecules) at a temperature of 6000 K. What are the average translational kinetic energy per atom |

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