A ball is thrown vertically upward from the ground with speed v0 and is subject to a quadratic drag with magnitude cv2 . a) Show that the maximum height the ball reaches is given by ymax = v 2 ter 2g ln v 2 ter + v 2 0 v 2 ter . b) Show that the speed of the ball when it returns to the ground is given by vterv0 p v 2 ter + v 2 0 . Discuss the case when there is a lot of air resistance, and the case when there is very little.

The field between two charged parallel plates is kept constant. if the two plates are brought closer together, the potential difference between the two plates either a) decrease b) does not change c) increase?

If a hiker that weighs 600 newtons climbs a 50 meter hill, how much gravitational potential energy has the hiker gained?

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