The attendance qt a seminar in a year 1 was 500 in year 2 the attendance changed by 100 what was the percent change in attendance?

Sound waves are mechanical waves in which the particles in the medium vibrate ina direction parrallel to the direction of energy transport. what is another name of the type of wave that transfers energy in this way?

What is an aquifer for science class

The amount of work done is determined by 2 factors. describe an example of work (using the scientific definition) list the 2 factors that determine the amount of work done.