Average velocity and speed with direction changes: word problems TATUS
As shown in the figure below, Louisa rushes 40 m toward her truck. She notices she forgot her bag and returns
back to the house. Her total travel time is 120 s.
40 m
40 m
What is Louisa's average velocity over the 120 s period?
S
Do 4 problems
Chec

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.

Name three different units of energy used to measure heat and describe what type of situations each is usually used.

Which sound characteristic is not affected by the relative motion of an object