Scientists can calculate the distance from the seismograph station to the focus using a. the difference in arrival times of p and surface waves. b. the difference in arrival times of p and s waves. c. the difference in arrival times of s and surface waves. d. none of the above.

Spend time observing or thinking about events that involve matter and energy. which events can you explain? which events can’t you explain?

Complete the statement about memory improvement. ( )involves organizing and breaking down information into easier groups to expand capacity. rehearsal is the verbal repetition of information. these techniques are especially important for the improvement of ( ) memory.

In a heat engine if 1000 j of heat enters the system the piston does 500 j of work, what is the final internal energy of the system if the initial energy was 2000 j? 1. write the equation 2.list out your known variables 3.plug the numbers into the equations 4.solve 5.write your solution statement that includes initial energy and final