A 4-g bullet is fired into a 1.4-kg block that is resting on a table. After impact, the block with the embedded bullet slides 8 cm across the table before coming to rest again. The coefficient of kinetic friction between the block and the surface of the table is 0.71. What was the initial speed of the bullet? (Practise how to derive an algebraic expression for the speed of the bullet before calculating the final result.)

## Calculate the buoyant force on a helium balloonGiven the mass of the rubber in the balloon is 1.40 g, what is the net vertical force on the balloon if it is let go, Calculate the buoyant force on a 2.00 L helium balloon. |

## What is the distance between the two spectral linesA light source emits two spectral lines: one at 473 nm and one at 722 nm. what is the distance between the two spectral lines in the first order spectrum |

## What is the maximum possible acceleration of a carIn the Soapbox Derby, young participants build non-motorized cars with very low-friction wheels, What is the maximum possible acceleration of a car moving down this stretch of track |

## Calculate the final pressureHow much work is required to compress 5.05 mol of air at 19.1°C and 1.00 atm to one-eighth of the original volume by an isothermal process |

## Find the change in entropy of reservoir and universeThe change in specific enthalpy during the melting of ice at 0 degrees C and 1.01 X 10^5 Pa is ?h= 333.39 kj/kg. find the change in entropy of reservoir and universe |

## Determine the tension in the threadsTwo identical small insulating balls are suspended by separate 0.22-m threads that are attached to a common point on the ceiling. Each ball has a mass of 8.10 10-4 kg. |

## Illustrate where will the end of spring line up with marksA spring with 58 hangs vertically next to a ruler. The end of the spring is next to the 11- mark on the ruler. If a 2.5- mass is now attached to the end of the spring, illustrate where will the end of the spring line up with the ruler marks? |

## Determine the speed sports car at impactA 910-kg sports car collides into the rear end of a 2100-kgSUV stopped at a red light. The bumpers lock, the brakes are locked, What was the speed sports car at impact |

## Find the acceleration due to the gravity on marsMars has a mass of 6.4*10^23 kg and radius of 3,400,000 m. find the acceleration due to the gravity on Mars |

## Find the velocity (speed) of the wood blockA 0.05 kg bullet traveling at 600 m/s hits a 7.4 kg block of wood and stays in the wood. What is the velocity (speed) of the wood block immediately after the bullet hits it |

## What is the mass of the meter rulea meter rule hangs motionless supported at 30cm mark. It has a 0.02kg mass hanging from the 0meter mark |

## Determine the difference in final speeds of the two sphereTwo metal spheres, each of mass 14 g and initially at rest, are dropped from a height of 6 m in an evacuated chamber. Find the difference in final speeds of the two spheres |

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