"The office personnel at Garden Glory use a database application to record services and related data changes in this database. For a new service, the service-recording application reads a row from the OWNED_PROPERTY table to get the PropertyID. It then creates a new row in GG_SERVICE and updates TotalHoursWorked in EMPLOYEE by adding the HoursWorked value in the new PROPERTY_SERVICE record to TotalHours Worked. This operation is referred to as a Service Update Transaction. In some cases, the employee record does not exist before the service is recorded. In such a case, a new EMPLOYEE row is created, and then the service is recorded. This is called a Service Update for New Employee Transaction."

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?