Question

question 19 (1 point)
in a wave, the maximum displacement of points of the wave from equilibrium is called the waves
speed.
frequency.
wavelength.
amplitude.
question 20 (1 point)
in general, sound is conducted fastest through
gases.
liquids.
solids.
a vacuum.

Explanation:

Question 19

• Speed of a wave is the distance traveled per unit time.
• Frequency is the number of oscillations per unit time.
• Wavelength is the distance between two consecutive similar points on a wave.
• Amplitude is defined as the maximum displacement of points on a wave from their equilibrium position. So the correct option is amplitude.

• Sound travels through a medium by vibrating particles. In gases, particles are far apart; in liquids, they are closer; in solids, particles are closely packed, allowing faster vibration transfer. Sound can't travel in a vacuum. So sound is fastest in solids.

Answer:

D. amplitude (assuming the options are labeled A to D as speed, frequency, wavelength, amplitude respectively)

Question 20