As you finish listening to your favorite compact disc (CD), the CD in the player slows down to a stop. Assume that the CD spins down with a constant angular acceleration. Part A If the CD rotates clockwise (let's take clockwise rotation as positive) at 500rpm (revolutions per minute) while the last song is playing, and then spins down to zero angular speed in 2.60s with constant angular acceleration, what is vector alpha, the angular acceleration of the CD, as it spins to a stop? Express your answer in radians per second squared. (aka rad/s^2)

Steam locomotive uses the back-and-forth motion : A steam locomotive uses the back-and-forth motion of a drive rod to turn its 1.55 m diameter wheel. Each compete oscillation of the rod corresponds to one wheel revolution.What's the rod's oscillation frequency when the train is moving at 30 m/s ? |

Mounted at angle of 35 degrees on a frictionless incline : A spring is mounted at angle of 35 degrees on a frictionless incline. The spring is compressed by 15 cm where it is allowed to propel a mass of 5.5 kg up the incline. a. if the spring constant is 550 N/m, how fast is the mass moving when it leaves th.. |

Object lies between the focal point and the mirror : A concave mirror has a focal length of 25.8 cm. The distance between an object and its image is 51.4 cm. Find (a) the object and (b) image distances, assuming that the object lies beyond the center of curvature and (c) the object and (d) image distan.. |

Find the mass of the second projectile : A 14kg projectile is launched at 380m/s at a 55 (degrees) angle to the horizontal. At the peak of its trajectory it collides with a second projectile moving horizontally, in the opposite direction, at 140m/s . The two stick together and land 9.8km ho.. |

Finish listening to your favorite compact disc : As you finish listening to your favorite compact disc (CD), the CD in the player slows down to a stop. Assume that the CD spins down with a constant angular acceleration. Part A If the CD rotates clockwise (let's take clockwise rotation as positiv.. |

Study electrical oscillations in the human brain : Physicians use electroencephalograms (EEGs) to study electrical oscillations in the human brain. So-called beta oscillations, whose enhancement has been linked to alcoholism, have frequencies from 12 to 30 Hz . What's the corresponding range in perio.. |

What is the magnitude of the change in its momentum : A 1870 kg truck traveling north at 37 km/h turns east and accelerates to 52 km/h. (a) What is the change in the truck's kinetic energy? (b) What is the magnitude of the change in its momentum? |

Magnitude of the larger of the two resistances : When a 42.0-V emf device is placed across two resistors in series, a current of 12.0 A is flowing in each of the resistors. When the same emf device is placed across the same two resistors in parallel, the current through the emf device is 62.0 A. Wh.. |

Two masses are connected by a string : Two masses are connected by a string which goes over an ideal pulley. Block A has a mass of 4.75kg and can slide along the smooth plane inclined by 37.0 degrees above the horizontal. The masses remain stationary. a) draw a free body diagram b) what m.. |

## What is its speed in this smaller sectionWater flowing through a pipe suddenly comes to a section of pipe where the pipe diameter decreases to 86% of its previous value. what is its speed in this smaller section |

## Find the recoil velocity that the raft would havea 55 kg swimmer is standing on a stationary 175 kg floating raft. the swimmer then runs off the raft horizontally with a velocity of + 3.7 m/s realtive to the shore. Find the recoil velocity that the raft would have |

## Motion in more than one directionA cartoon coyote sets out to capture the elusive road-runner by wearing a pair of ACME jet-powered roller skates, which provide a constant horizontal acceleration of 10 m/s^2. The coyote starts off at rest 100 m from the edge of a cliff at the ins.. |

## Compute the length of the rodA thin uniform rod (mass = 1.95 kg) swings about an axis that passes through one end of the rod, What is the length of the rod |

## What is their speed at the bottom of the hillGayle runs at a speed of 8.00 m/s and dives on a sled, initially at rest on the top of a frictionless, snow-covered hill, that has a vertical drop of 23.0 m. What is their speed at the bottom of the hill |

## Compute the angular velocity of an electronCalculate the angular velocity of an electron orbiting a proton in the hydrogen atom, given the radius of the orbit is 0.500x10-10 m |

## What is the speed of the pendulumA hot iron horseshoe (mass = 0.50- kg) which has just been forged, is dropped into 1.45 -L of water in a 0.50 kg iron pot at first at 22oC. If the final equilibrium temperature is 32oC, calculate the initial temperature of the hot horseshoe (in Ce.. |

## What color would it have seemed to youYou're caught running a red light on Hwy 316. Attempting to impress the skeptical patrol officer with your physics knowledge, If you had been traveling that fast and the light actually was yellow, what color would it have seemed to you |

## What is the acceleration of a carWhat is the acceleration of a car that moves at a steady velocity of 100 km/h for 100 second? Explain your answer and state why this question is an exercise in careful reading as well as in physics. |

## Obtain the work done by the force of gravityStarting from rest, a 4.50-kg block slides 3.00 m down a rough 30.0° incline. The coefficient of kinetic friction between the block and the incline is ?k = 0.436. Determine the work done by the force of gravity |

## Find what is the heat input to the gas13 of nitrogen gas at STP are compressed in an isochoric process to a pressure 20. What is the heat input to the gas |

## Determine the cars rotational energyA car with a total mass of 1.93 103 kg has wheels of radius 35.0 cm and moment of inertia 0.715 kg · m2. Find the car's rotational energy when the car is moving at a speed of 30.0 m/s |

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