Awater jet leaves a fixed nozzle with a velocity of 10 m/s. the jet diameter is 10 cm. a 30o cone is pushed into the water jet at a speed of 5 m/s. the water impinges on the cone with the jet axis and the cone axis in perfect alignment so that the water is divided evenly by the cone. bernoulli’s equation suggests that because the pressure on the jet boundary is constant, the water velocity relative to the cone surface is constant. determine the thickness of the water stream when it reaches the base of the cone.

Tom is having a problem with his washing machine. he notices that the machine vibrates violently at a frequency of 1500 rpm due to an unknown rotating unbalance. the machine is mounted on 4 springs each having a stiffness of 10 kn/m. tom wishes to add an undamped vibration absorber attached by a spring under the machine the machine working frequency ranges between 800 rpm to 2000 rpm and its total mass while loaded is assumed to be 80 kg a) what should be the mass of the absorber added to the machine so that the natural frequency falls outside the working range? b) after a first trial of an absorber using a mass of 35 kg, the amplitude of the oscillation was found to be 10 cm. what is the value of the rotating unbalance? c) using me-3.5 kg. m, find the optimal absorber (by minimizing its mass). what would be the amplitude of the oscillation of the absorber?