If the law of conservation of energy applies to a situation, then: A. matter is entering and leaving the system.
B. the output work being done is greater than the work being put into
the system.
C. the system is an open one.
D. the total (PE + KE) before an event is equal to the total (PE+ KE)
after the event.
SUBMIT

1. when conducting a test on what kind of music increases the growth of plants, all of the following would fail to meet to fair test standard except (1 point) using different kinds of plants. giving some plants more water than others. exposing the plants to different types of music. using nutrient-rich soil for one and lesser soil for others. 2. engineering uses scientific thinking to solve real-world problems. (1 point) true false 3. what does it mean to test a hypothesis? (1 point) pass a quiz on other scientists’ results analyze only the results from scientific sources not make assumptions about how an experiment will turn out see if the results of an experiment are what the scientist predicted