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?

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 the resistance of the bulb-current in the bulb : A 100 W lightbulb is plugged into a standard 120 V outlet. How much does it cost per month (30 days) to leave the light turned on continuosly? Assume electrical energy costs 7.5/kWh. (Enter dollars with no unit) What is the resistance of the bulb? Wh.. |

How fast is the center of mass of the two-stone system : A stone is dropped at t = 0. A second stone, with 6 times the mass of the first, is dropped from the same point at t = 160 ms. (a) How far below the release point is the center of mass of the two stones at t = 300 ms? (Neither stone has yet reached t.. |

## Find the momentum of the propellant gasesThe expanding gases that leave the muzzle of a rifle also contribute to the recoil. A .30 caliber bullet has mass 7.20×10?3kg, Find the momentum of the propellant gases in a coordinate system attached to the earth as they leave the muzzle of the rifl.. |

## What is the radius of the turnCar has the mass M = 1100kg at 60.0 km/hour. What is the radius of the turn if theta = 20.0 degrees |

## Determine what is the x component of the friction forceA dancer is standing on one leg on a drawbridge that is about to open. Before the drawbridge starts to open, it is perfectly level with the ground. The dancer is standing still on one leg. |

## How much charge does this point charge carryA point charge is moved in an electric field. The potential changes from -87 V to +30 V between the initial and final position. The work done by the electric field is 156 J |

## Find percentage of the original energy is lostA power transmission line 50km long has a total resistance of 0.60 ohms. What percentage of the original energy is lost when the transformer is used |

## At what angle do the raindrops strike the windshieldA bus with a vertical windshield moves along in a rainstorm at speed V relative to the ground. At what angle do the raindrops strike the windshield |

## A federation starshipA Federation starship ( 2.20×10^6kg ) uses its tractor beam to pull a shuttlecraft ( 2.20×10^4kg ) aboard from a distance of 12.0km away. The tractor beam exerts a constant force of 4.0×104N on the shuttlecraft. Both spacecraft are initially at.. |

## Find the rate of the wheel rotation in revolutions perminuteA space station, in the form of a wheel 131 m in diameter, rotates to provide an "artificial gravity" of 3.50 m/s2 for persons who walk around on the inner wall of the outer rim. Find the rate of the wheel's rotation in revolutions per minute |

## Illustrate the magnitude of the centripetal accelerationIllustrate what was the magnitude of the centripetal acceleration of the rock when it was on the string? (b) What was its speed when it was on the string? |

## The direction as an angle above the horizontalWhat is your displacement after running 2.60 west on Strawberry Fields, 1.1 south on Penny Lane, and 5.0 north of east at 40 degree on Abbey Road. |

## Find the original speed of the sonA father racing his son has three-fifths the kinetic energy of the son, who has half the mass of the father. What is the original speed of the son |

## Approximately how much energy is radiated per secondThe temperature inside a house is 25 degree C while the temperature outside is 10 degree C. Approximately how much energy is radiated per second |

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