A cannon with a mass of 115 kg shoots a cannonball with a mass of 8 kg. If the speed of the cannon ball as it leaves the cannon is 185 m/s,what is the speed of the cannon at that time??(assume cannon is initially at rest, not fastened down in any way,and there is no friction between cannon and the ground)

## Find the amount of heat conducted from one endOne end of an iron poker is placed in a fire where the temperature is 495°C, and the other end is kept at a temperature of 27°C. The poker is 1.2 m long and has a radius of 5.0 multiplied by 10-3 m. Ignoring the heat lost along the length of the p.. |

## What is the cars potntial energy afterwardhow much work must be done to raise a 1100 kg car 1.5 m above the ground? what is the cars potntial energy afterward |

## What is the thickness of the plasticA very thin sheet of plastic (n=1.65) covers one slit of a double-slit apparatus illuminated by 640nm light. What is the (minimum) thickness of the plastic |

## Estimate the distance the car traveledA car moves with an initial velocity of 5m/s and is subjected to a deceleration of 3m/s2 for 2 seconds. Calculate the distance the car traveled |

## What is the total energy of vibrationA 340kg wooden raft floats on a lake. When a 65kg man stands on the raft, it sinks 3.0cm deeper into the water. When he steps off, What is the total energy of vibration |

## Find the magnitude and direction of the magnetic fieldTwo long, straight wires are parallel and are separated by a distance of d = 0.230 m, The top wire in the sketch carries current I1 = 3.80 A, toward the right, and the bottom wire carries current I2 = 7.00 A, what are the magnitude and direction of t.. |

## Compute the number of turns in the solenoidA certain superconducting magnet in the form of a solenoid of length 0.80 m can generate a magnetic field of 14.0 T in its core, Find the number of turns in the solenoid. |

## Compute what is the charge of each ionThe magnitude of the electrostatic force between two identical ions that are separated by a distance of 5.0 10-10 m is 8.28 10-9 N. What is the charge of each ion |

## Find maximum height above the surface of the moonStanding on the surface of a small spherical moon whose radius is 6.30 104 m and whose mass is 8.00 1018 kg, What maximum height above the surface of the moon will the rock reach |

## Calculate the students final angular velocityA student sits on a swivel seat. Initially the student is at rest, holding a spinning bicycle wheel that has an angular velocity of 10.5 rad/s, Find the student's final angular velocity |

## A racetrack has the shape of an inverted coneA racetrack has the shape of an inverted cone, as the drawing shows. On this surface the cars race in circles that are parallel to the ground, and the surface is at an angle = 40°. For a speed of 35 m/s, at what value of the distance d should a drive.. |

## By how various revolutions does the fan turn while stoppingA ceiling fan with 80-cm-diameter blades is turning at 60rpm. Suppose the fan coasts to a stop 30s after being turned off. |

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