A boulder that can be modeled as a sphere rolls down a hill without slipping. The radius of the boulder is 1meter, the mass of the boulder is 200 kg. The boulder started from rest and rolls 100 meters down the surface of the hill which has a constant slope of 15 degrees. 1. What is the speed of the boulder just as it reaches the bottom of the hill

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