Please answer the equestrians in the picture, if it’s not clear enough I have the questions down below: 2. You click your fingers in a large hall and hear the echo 0.5 seconds later off the back wall. How far is the back wall?

3. A boat sends a sound to the bottom of the ocean and it takes 2 seconds to return to the boat. How deep in the ocean?

An explanation would be great too :)

15 points awarded

Bob camina 200 m sur, luego trota 400 m suroeste, luego camina 200 m en una dirección 30? norte del este. a. dibuje una gráfica de los movimientos de bob. use una regla y transportador. b. use método gráfico y analíitico para hallar el desplazamiento total que bob recorrió. (magnitud y dirección) c. compare los resultados obtenidos por el método gráfico y analítico. (por ciento de diferencia).

The coefficient of friction is a number that represents the resistance to sliding between two in contact with one another.

Sawyer is studying diffraction. he draws a diagram of a plane wave to show how light waves travel. which best describes sawyer’s error? the wave fronts should be perpendicular to the direction in which the waves move. the arrow showing the direction of movement of the waves should be pointing to the left. the arrow showing the direction of movement of the waves should be pointing downward. the wave fronts should be both parallel and perpendicular to the direction in which the waves move.