A 920 kg sports car collides into the rear end of a 2300 kg SUV stopped at a red light. The bumpers lock, the brakes are locked, and the two cars skid forward 2.6 m before stopping. The police officer, knowing that the coefficient of kinetic friction between tires and road is 0.30, calculates the speed of the sports car at impact. What was that speed?

Gasoline is made up of hydrocarbons : Gasoline is made up of hydrocarbons. Suppose 80% of mass of gasoline is carbon and all of this becomes CO2 in combustion. If the density of gasoline is 6.7 lb/gal, how much CO2 is emitted per gallon of gasoline burned? The atomic mass of carbon is 12.. |

Initial kinetic energy of truck was lost during collision : Assume that a cement truck with a mass of 10,000 kg hits you while you were stopped at a traffic light, and that you are driving a Yugo with a mass of 750 kg. If the truck was traveling at 15 mph and the crash makes you stick together (you and the.. |

For a coal gasification project being planned : For a coal gasification project being planned, 26,000 tons of coal per day is used to produce 250,000,000 cubic feet per day of natural gas. If the coal is rated at 8700 Btu/lb and the gas at 950 Btu/cubic ft, what will be the efficiency of this plan.. |

The solar insolation-what is the minimum area required : Suppose the solar insolation is 850 W/m2 and you can collect 20% of the energy that fall on the surface of a solar hot dog cooker. If you need 240 W to cook a hot dog, what is the minimum area required? |

Calculates the speed of the sports car at impact : A 920 kg sports car collides into the rear end of a 2300 kg SUV stopped at a red light. The bumpers lock, the brakes are locked, and the two cars skid forward 2.6 m before stopping. The police officer, knowing that the coefficient of kinetic frict.. |

Find its velocity and find its acceleration : An object moves according to x = 3 m e^(-2/s t), y = 4 m sin(3/s t), z = -5 m cos(3/st) . a. Find its velocity. b. Find its acceleration. Note: s is seconds ex:-2/s means -2 per second and m is meters |

Electron enters the region between two plates traveling : An electron enters the region between two plates traveling along the x-direction with a speed of v = 2.53x10^6 m/s. Both plates are parallel to the x-y plane and are separated by 3.2 cm. The potential of the top plate at z = 3.2 cm is +150 V while th.. |

What is the frequency of the light when it reaches earth : Most of the galaxies in the universe are observed to be moving away from Earth. Suppose a particular galaxy emits orange light with a frequency of 5.000 \times 10^{14} {\rm Hz}. If the galaxy is receding from Earth with a speed of 3725{\rm km/s} , wh.. |

Find head flux and temperature distribution-thickness window : A classroom window made of glass is 1cm thick. The window is 2m square . If the thermal conductivity of glass k = 0.96 w/(mK) and the temperature is 21C inside and 32C outside, find the head flux and the temperature distribution along the thicknes.. |

## What is the velocity of the shuttle after 5 secondsAt launch the space shuttle has an overall upward acceleration of about 5m/s^2, how far inot the air will it travel, assumin that it travels straight up, what is the velocity of the shuttle after 5 seconds |

## Find the amplitude of the springA spring is oscillating with a frequency of 1.7Hz. 3.9 seconds after the spring is released it is -20cm from equilibrium. Find the amplitude of the spring |

## Travelled in the time between the sighting of the freightA passenger train is travelling at 32 m/s when the engineer sees a freight train 384 m ahead of his train travelling in the same direction on the same track. The freight train is moving at a speed of 5.7 m/s. |

## Determine the temperature of the gas inside the sunspotConsider a sunspot with measured field strength 1000 Gauss. Assume the ratio of the total brightness of the gas at the center of the sunspot, Determine the temperature of the gas inside and outside the sunspot |

## Evaluate the centripetal acceleration of the electronIn the Bohr model of the hydrogen atom, an electron moves in a circular path around a proton. The speed of the electron is approximately 1.95 106 m/s. Find the centripetal acceleration of the electron |

## What is the minimum mass of the dropletA falling stone takes 0.28 s to travel past a window 2.2 m tall. From what height above the top of the window did stone fall. |

## What is the charge on the ball bearingA small glass bead has been charged to + 25nC . A tiny ball bearing 3.0cm above the bead feels a 1.8×10?2Ndownward electric force. What is the charge on the ball bearing |

## Compute the angular frequency of the motionThe length of a simple pendulum is 0.87 m and the mass of the particle (the "bob") at the end of the cable is 0.21 kg. What is the angular frequency of the motion |

## Find the kinetic energy of solid sphere at the bottomA small solid sphere, with radius 0.25 cm and mass 0.56 g rolls without slipping on the inside of a large fixed hemisphere with radius 15 cm, What is its kinetic energy at the bottom |

## Q1 three long wires wire 1 wire 2 and wire 3 hangq1. three long wires wire 1 wire 2 and wire 3 hang vertically. the distance between wire 1 and wire 2 is 20.0 cm. on |

## Determine the specific heat of the unknown second sampleA 100 g aluminum calorimeter contains 250 g of water. The two substances are in thermal equilibrium at 10°C. Determine the specific heat of the unknown second sample |

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