In 1963 caltech astronomer maarten schmidt observed that quasar 3c273 was moving at 15.8 percent of the speed of light away from us and thus conculded it could not be an object in our galaxy since it would have left the galaxy a long time ago at that speed. what feature of the quasar to did he measure to obtain that value?

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