So far in this tutorial, you have been launching a pumpkin. let's see what happens to the trajectory if you launch something bigger and heavier, like a car. compare the trajectory and range of the pumpkin to that of the car, using the same initial speed and angle (e. g., 45∘). (be sure that air resistance is still turned off.) which statement is true? so far in this tutorial, you have been launching a pumpkin. let's see what happens to the trajectory if you launch something bigger and heavier, like a car. compare the trajectory and range of the pumpkin to that of the car, using the same initial speed and angle (e. g., ). (be sure that air resistance is still turned off.) which statement is true? the trajectories differ; the range of the car is longer than that of the pumpkin. the trajectories differ; the range of the car is shorter than that of the pumpkin. the trajectories and thus the range of the car and the pumpkin are identical.

Follow these directions and answer the questions. 1. set up the ripple tank as in previous investigations. 2. bend the rubber tube to form a "concave mirror" and place in the ripple tank. the water level must be below the top of the hose. 3. generate a few straight pulses with the dowel and observe the reflected waves. do the waves focus (come together) upon reflection? can you locate the place where the waves meet? 4. touch the water surface where the waves converged. what happens to the reflected wave? 5. move your finger twice that distance from the hose (2f = c of c, center of the curvature) and touch the water again. does the image (the reflected wave) appear in the same location (c of c)? you may have to experiment before you find the exact location. sometimes it is hard to visualize with the ripple tank because the waves move so quickly. likewise, it is impossible to "see" light waves because they have such small wavelengths and move at the speed of light. however, both are examples of transverse waves and behave in the same way when a parallel wave fronts hit a curved surface.

An object moves from position +34m to the position -15m in 15 seconds. what is the total displacement? what is the total velocity?

At 20∘c, the hole in an aluminum ring is 2.800 cm in diameter. you need to slip this ring over a steel shaft that has a room-temperature diameter of 2.804 cm . 1. to what common temperature should the ring and the shaft be heated so that the ring will just fit onto the shaft? coefficients of linear thermal expansion of steel and aluminum are 12×10−6 k−1 and23×10−6 k−1 respectively.