8. Sounds with the same loudness and pitch may differ in a. amplitude c. quality b. frequency d. wavelength 9. A sound wave has a low pitch. Therefore, it has a low a. amplitude C. wavelength b. frequency d. wave velocity 10. Which of the following statements best describes violet light as compared to the other colors of light? a. It is the least intense. b. It has the least energy. It has the lowest frequency. d. It has the shortest wavelength. 11. Blue light has a shorter wavelength than and С. red light. a. the same frequency as b. a lower frequency than С. a higher frequency than d. an uncomparable frequency with 12. If one end of a metal knitting needle with three tiny pieces of wax placed 2 cm apart is heated in the flame of a candle, which of the following will happen? а. The wax in the middle will melt first. b. The wax closest to the flame will melt first. С. The pieces of wax will melt at the same time. d. The wax farthest from the flame will melt first. 13. Which of the following statements describing the movement of fluids in a convection cell is true? а. Denser fluid rises. b. Denser fluid sinks. С. Density is not a factor for the movement of the fluids. d. none of the above
Properties of sound
A sound wave is a mechanical wave (or mechanical vibration) that transit through media such as gas (air), liquid (water), and solid (wood).
Quality Of Sound
A sound or a sound wave is defined as the energy produced due to the vibrations of particles in a medium. When any medium produces a disturbance or vibrations, it causes a movement in the air particles which produces sound waves. Molecules in the air vibrate about a certain average position and create compressions and rarefactions. This is called pitch which is defined as the frequency of sound. The frequency is defined as the number of oscillations in pressure per second.
Categories of Sound Wave
People perceive sound in different ways, like a medico student takes sound as vibration produced by objects reaching the human eardrum. A physicist perceives sound as vibration produced by an object, which produces disturbances in nearby air molecules that travel further. Both of them describe it as vibration generated by an object, the difference is one talks about how it is received and other deals with how it travels and propagates across various mediums.
Pls. answer number 8-13 with slight explanation.
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