Define the independent and dependent variables:

A researcher was interested in finding out if type of learning was related to class performance. She randomly assigns 100 General Psychology into 1 of 2 groups: 50 students use computerized instruction exercises; the other 50 spend an equal amount of time reviewing the text and lecture notes. At the end of the semester the researcher compares final exam scores in both groups.

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

Which of the following statements are true for an isothermal process? check all that apply. - during an isothermal process, the work done by the gas equals the heat added to the gas. - during an isothermal process, the internal energy of the system changes. - an isothermal process is carried out at constant temperature. - an isothermal process is carried out at constant pressure. - an isothermal process is carried out at constant volume.

Which of the following is the largest disadvantage of about half of the electricity in the united states comes from burning