I was recently changed from a hourly wage to salaried - part time, how does my work hour requirements as a part timer differ from a salaried full time

Unfortunately, that is too complex a question to answer in an online forum like this.  However, in general, it is possible that it does not change much.  As an hourly employee, you should have been paid for all time that you worked on an hourly basis.  If you are now be paid a salary for part-time work, then the employer still must pay you for all hours and can deduct any unworked hours from your salary. For example, if you worked 20 hours per week at an hourly rate of $10.00, the calculation is 20 x $10.00 = $200.00.  Now, the salary would be different.  If you are paid a part-time salary of $150 for 15 hours per week at an hourly rate of $10.00, then the employer would need to pay you an additional $50.00 if you worked 20 hours in a week.  However, the emplyer could pay you $100 if you only worked 10 hours in a week. There are numerous senarios and I suggest you consult with an experienced employment attorney if you want to fully discuss this situation.