Two cars collide at an intersection. Car A, with a mass of 2000 kg , is going from west to east, while car B, of mass 1400 kg , is going from north to south at 17.0m/s. As a result of this collision, the two cars become enmeshed and move as one afterwards. In your role as an expert witness, you inspect the scene and determine that, after the collision, the enmeshed cars moved at an angle of 65.0 degrees south of east from the point of impact. 1: How fast were the enmeshed cars moving just after the collision? 2: How fast was car A going just before the collision?

Produce sound intensity equal to that of normal conversation : A typical decibel level for a buzzing mosquito is 40 dB and normal conversation is approximately 50 dB. How many buzzing mosquitoes will produce a sound intensity equal to that of normal conversation? |

Planets have so far been detected beyond our solar system : Over 500 planets have so far been detected beyond our solar system. This is accomplished by looking for the effect the planet has on the star. The star is not truly stationary; instead, it and its planets orbit around the center of mass of the sys.. |

A baseball coach shouts loudly at an umpire standing : A baseball coach shouts loudly at an umpire standing 3.8 meters away. If the sound power produced by the coach is 2.2 × 10?3 W, what is the intensity of the sound when it reaches the umpire? Answer in units of W/m2. |

Force is the frictional force between the tires and the road : A 1000kg car moving 40m/s skids to a stop. During the skid, the only force is the frictional force between the tires and the road, which is 6000N. Use work and energy to find the distance the car moves before coming to a stop. |

Two cars collide at an intersection : Two cars collide at an intersection. Car A, with a mass of 2000 kg , is going from west to east, while car B, of mass 1400 kg , is going from north to south at 17.0m/s. As a result of this collision, the two cars become enmeshed and move as one af.. |

Calculate the average power carried by the wave : A piano wire with mass 3.45 g and length 77.0 cm is stretched with a tension of 33.0 N . A wave with frequency 100 Hz and amplitude 1.70 mm travels along the wire. Calculate the average power carried by the wave. What happens to the average power if .. |

Final velocities of ball if collision is perfectly inelastic : Ball 1, with a mass of 110 and traveling at 14.0 , collides head on with ball 2, which has a mass of 320and is initially at rest. What are the final velocities of each ball if the collision is perfectly elastic? What are the final velocities of each .. |

Determine the coefficient of kinetic friction : Your favorite physics book (total mass 2.4kg) is pushed across the floor at a constant speed by a force of F = 26N at an angle (theta)= - 42 degrees (aiming downward 42 degrees below the horizontal). Determine the coefficient of kinetic friction ? k .. |

A ring is fitted loosely around a long : A ring is fitted loosely (with no friction) around a long, smooth rod of length L = 0.561 m. The rod is fixed at one end, and the other end is spun in a horizontal circle at a constant angular velocity of ? = 3.57 rad/s. |

## What was the force on the sled during the impactA child's sled has rails that slide with little friction across the snow. Logan has an old wooden sled with heavy iron rails that has a mass of 11 m/s quite a bit for a 27 kg child! Logan runs at 4.0 m/s and leaps onto the stationary sled and hold.. |

## Determine the initial volume of mercuryYou are designing a precision mercury thermometer based on the thermal expansion of mercury, Determine the initial volume of mercury that allows this change, Find the radius of a spherical bulb that contains this volume of mercury |

## What is its acceleration due to the earths gravitationWhen a falling meteoroid is at a distance above the Earth's surface of 2.50 times the Earth's radius, what is its acceleration due to the Earth's gravitation |

## Calculate the total number of revolutions turnedA machine shop grinding wheel accelerates from rest with a constant angular acceleration of 2.3 rad/s^2 for 7.1 s, Find the total number of revolutions turned |

## Calculate the power spectrum of square pulseCalculate the power spectrum of square pulse with amplitude, A and length, τ0. plot the power spectrum, shower several zero-crossings |

## Calculate how much work is done on the capacitorA large parallel plate capacitor has plate separation of 0.85 cm and plate area of 391 cm2. How much work is done on the capacitor as the plate separation is increased to 1.70 cm |

## Compare the electric field strengthThe electric charge of a proton is distributed over a volume. The distribution of the proton can be approximated by the exponential equation rho = e/(8*pi*b)exp(-r/b). r is the radial position inside the proton and b equals .23 * 10^-15 m. Find th.. |

## Determine the energy rejected in KJA reversible power cycle whose thermal efficiency is 40% receives 50 kJ by heat transfer from a hot reservoir at 600 K and rejects energy by heat transfer to a cold reservoir at temperature Tc. Determine the energy rejected in KJ |

## What is the mass of the sculptureWhat horizontal force P must a worker exert on the rope to position 50 kg. crate directed over the trailer. |

## Find the initial speed of this second balloonIn the annual battle of the dorms, students gather on the roofs of Jackson, A second balloon launched at the same angle hits the edge of Walton's roof. Find the initial speed of this second balloon |

## Assuming the same rate of accelerationThe emissivity of tungsten is 0.350. A tungsten sphere with a radius of 1.19 is suspended within a large evacuated enclosure whose walls are at a temperature of 285.0 . What power input is needed to maintain the sphere at a temperature of 2500.0 i.. |

## What thrust does the engine develop at lift offA rocket has a total mass of 1.00 x 105Kg and a burnout mass of 1.00 x 104Kg, including engines, shell, and payload. What thrust does the engine develop at lift off |

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