Arollercoaster car with a mass of 15 kg rolls down a ramp that is 10.0 meters tall. a) draw a sketch of the situation. b) what is the initial potential energy of the rollercoaster car? c) what is the initial kinetic energy of the rollercoaster car? d) calculate the speed of the roller coaster at the bottom of the ramp.

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