A machine is supported on four steel springs for which damping can be neglected. The natural frequency of vertical vibration of the machine-spring system is 200 cycles per minute. The machine generates a vertical force p(t)=p0sinwt. The amplitude of the resulting steady-state vertical displacement of the machine is u0=0.2 in. when the machine is running at 20 rpm, 1.042 in at 180 rpm, and 0.0248 at 600 rpm. Calculate the amplitude of vertical motion of the machine if the steel springs are replaced by four rubber isolators which provide the same stiffness, but introduce damping equivalent to 25% for the system. Comment on the effectiveness of the isolators at various machine speeds

What is the amount of the operating cash flow : Le Place has sales of $439,000, depreciation of $32,000, and net working capital of $56,000. The firm has a tax rate of 34% and a profit margin of 6%. The firm has no interest expense. What is the amount of the operating cash flow? |

Determine the amplitude of steady-state deflection : The motor in the unit runs at 300 rpm and produces an unbalanced force of 60 lb at this speed. Neglect weight of the beams and assume 1% viscous deflection in the system; for steel E=30,000 ksi. |

Find the temperature of the heating element : Two pots are identical except that the flat bottom of one is aluminum, whereas that of the other is copper. find the temperature of the heating element on which the copper bottom rests |

What you think about it: china continues to prosper : What you think about it: China continues to prosper and grow and in many ways they are eclipsing the US. |

Calculate the amplitude of vertical motion of the machine : A machine is supported on four steel springs for which damping can be neglected. The natural frequency of vertical vibration of the machine-spring system is 200 cycles per minute. The machine generates a vertical force p(t)=p0sinwt. |

Calculate the density of the solvent : A cylindrical storage tank has a radius of 1.22 m. When filled to a height of 3.71 m, What is the density of the solvent |

What is the level of her permanent income : How much will she set aside each year to achieve her retirement goal? What is the level of her consumption spending p.a.? |

The marketplace can often create efficiencies naturally : Government regulation is, at times, a result of market failure. The marketplace can often create efficiencies naturally through supply and demand. Unfortunately gaps of inefficiencies result in market dislocations. Thus governments believe they can r.. |

Find the value of the angle at which the projectile is fired : A projectile is fired with an initial velocity of 800 ft/s at a target B located 2000 feet above the gun A and at a horizontal distance of 12,000 feet. Neglecting air resistance, determine the value of the angle at which the projectile is fired. |

## Explain how to determine the final velocity of the cratethe 100 kg crate is originally at rest on the smooth horizontal surface. If a 200 newton force, acting at an angle of 45 degrees, is applied to the crate for 10 seconds. Determine the final velocity of the crate. |

## Determine the drivers perceptionAfter a few drinks under exactly the same conditions, the driver fails to stop in time and strikes the object at a speed of 35 mi/hr. Determine the driver's perception/reaction time before and after drinking. |

## What is the concentration of mlvss in the activated sludgeWhat is the concentration of MLVSS in the activated sludge (mg L-1) |

## Draw the shear and bending moment diagrams for the beamThe beam ABC of length L has two different moments of inertia (2I in AB, I in BC) and a constant elastic modulus E. It is fixed at point A has a roller support at point B and a load P at C. a. Sketch the deflected shape of this beam. |

## Highest point of the piping systema) The maximum flow rate that can be achieved without cavitation occurring in the piping system. b) The maximum elevation of the highest point of the piping system to avoid cavitation. |

## How many double-tracked sections are needed to allow trainsA light rail transit agency operates trains over a 25-km long single-track line. During the peak period, it operates five trains at 15-min headway. Train travels at an average speed of 50 km/hr. |

## Determine the specific gravity of barge runs on diesel fuela poorly designed 100 ft long homogeneous barge runs on diesel fuel, the fuel is held in a 2' tall trapezoidal tank of the same length as the barge. and is located at the bottom of the barge hull. |

## Determine the friction drag on one side of the plateWater flows past a triangular flat plate oriented parallel to the free stream as shown. Integrate the wall shear stress over the plate to determine the friction drag on one side of the plate. Assume laminar boundary layer flow. |

## Establish a horizontal distancea tape is calibrated and found to measure 100.04ft between the 0- and 100-ft marks. what measurements should be laid out to establish a horizontal distance of 682.25ft? |

## Determine the slenderness ratioDetermine the slenderness ratio of a 5 m column with built in ends if its cross- section is (a) circular with a radius of 40mm and (b) 50 mm square. Use the concept of effective length. |

## Find the mass of air in a closed chamber measuringFind the mass of air in a closed chamber measuring 35 ft by 20 ft by 10 ft, when the pressure is 17 lb/in^2 and the temperature is 75°F, assuming air to be an ideal gas |

## How long would it take for the sled to reach at end of trackIn 2003 at Holloman Air Force Base in New Mexico, test engineers set a world record by moving 192 lb payload at 6,453 miles per hour in a rocket sled. The rocket sled track, built in 1954, is 15.44 km in length. |

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