Q. A 1.60 kg object is held 1.20m above a relaxed, mass less vertical spring with a force steady of 320 N/m. The object is dropped onto the spring. How far does the object compress the spring?

Q. Infrared photons cause a particular piece of metal to emit photoelectrons. Would photoelectrons be emitted when the metal is illuminated by visible light?

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How far the object compresses the spring : Infrared photons cause a particular piece of metal to emit photoelectrons. Would photoelectrons be emitted when the metal is illuminated by visible light? |

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## What is the electric field near the surface of the sphereTwo charged spherical conductors are connected by a long conducting wire, and a charge of 15 μC is placed on the combina- tion. One sphere has a radius of 4.05cm and the other a radius of 6.05cm. |

## Why there is no friction between the road and the cars tiresImagine that the coefficient of kinetic friction between a certain 15kg box and the floor is 0.35. How hard would you have to push on it to move it at the constant speed of 2.6m/s across the floor. |

## What is the largest potential difference this emf sourceIf you connect these 3 resistors in series across a variable emf source of negligible internal resistance, what is the largest potential difference this emf source can be set to without damaging any of resistors. |

## Find an angle between the incident rayand the reflected rayA pair of in-phase stereo speakers is placed side by side, 2m apart. You stand directly in front of one of the speakers, 5m from the speaker. What do you hear. |

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## Star remains spherical during the entire processa car with a mass 1865 kg is travelling west and slows down uniformly to 8.5 m/s over a distance of 108 m. calculate the initial speed of the car if the required braking force is 7525 N |

## Suppose that the liquid is an ideal fluidA grating with 504 lines/mm is illuminated with light of wavelength 305 nm. What is an angular separation between the two lines formed in order m = 2. |

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## When the front of the train passes the workerWhen the front of the train passes the worker. A 1500 kg car moving north at 27.0 m/s is struck by a 2165-kg car moving east at 18.0 m/s. The cars are stuck together. How fast and in what direction do they move immediately after the collision. |

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