In general, sound waves travel fastest in _. a. solids b. liquids c. gases d – [Free] B60
In general, sound waves travel fastest in _. a. solids b. liquids c. gases d. vacuum 2. Sammy is talking to Sally. Position A is a position in front of Sammy’s mouth. Position B is a position in front of Sally’s ear. In order for Sally to hear Sammy’s voice, air particles must . a. move from A to B b. move from A to B and then back to A c. vibrate parallel to a line connecting A and B d. vibrate perpendicular to a line connecting A and B
π Sound Waves β Medium and Particle Motion
Question 1
In general, sound waves travel fastest in:
- a. solids
- b. liquids
- c. gases
- d. vacuum
Question 2
Sammy is talking to Sally. Position A is a position in front of Sammy’s mouth. Position B is a position in front of Sally’s ear.
In order for Sally to hear Sammy’s voice, air particles must:
- a. move from A to B
- b. move from A to B and then back to A
- c. vibrate parallel to a line connecting A and B
- d. vibrate perpendicular to a line connecting A and B
Answer
π Answer to Question 1
β In general, sound waves travel fastest in solids.This is because the particles in solids are much more tightly packed compared to liquids and gases, which allows the vibrational energy of sound waves to transmit more efficiently and quickly between particles.
In contrast, gases have widely spaced particles and transmit sound more slowly.
Sound cannot travel through a vacuum because there are no particles to carry the mechanical vibrations.
Final Answer: a. solids
π Answer to Question 2
β When Sammy speaks, the air particles between position A (near Sammyβs mouth) and position B (near Sallyβs ear) vibrate in a direction parallel to the line connecting A and B.This is because sound in air is a longitudinal wave, where the oscillations of air particles occur in the same direction as the wave propagation (parallel).
Thus, for Sally to hear Sammy’s voice, air particles vibrate back and forth along the line joining the two positions rather than moving permanently from A to B or vibrating perpendicular.
Final Answer: c. vibrate parallel to a line connecting A and B