1. compression a space in which particles have been spread apart 2. periodic energy an oscillating source of energy that repeats itself in a regular way 3. pulse a non-recurrent wave 4. rarefaction a space in which particles have been pushed together

Is the process of organizing data to reduce redundancy. a. normalization b. primary keying c. specifying relationships d. duplication

7. test average and grade write a program that asks the user to enter five test scores. the program should display a letter grade for each score and the average test score. write the following methods in the program: calcaverage: this method should accept five test scores as arguments and return the average of the scores. determinegrade: this method should accept a test score as an argument and return a letter grade for the score, based on the following grading scale: score letter grade 90-100 a 80-89 b 70-79 c 60-69 d below 60 f

The control unit takes ths instructions fetched by the preteched unit and translates them into a form that can be understood by