22 A transverse water wave is moving along the surface of some water. This causes a ball to movevertically without moving horizontally as it floats upon the surface. At one instant, the ball is at theposition shown.2.4 m0.70 mballdirection ofwave travelNOT TOSCALEThe wave has a frequency of 0.20 Hz and an amplitude of 0.70 m. The distance between a troughand an adjacent peak is 2.4 m.What is the distance travelled by the ball in a time of 20 s?A 5.6 m B 9.6 m C 11.2 m D 19.2 m23 A sound wave travels from left to right across a room. The variation with distance across theroom of the displacement of the air molecules at one instant is shown.At which distance will the air pressure be lowest?displacementdistance from left-handend of roomrightleft0A B C D24 A source emits a sound wave of a single frequency. The Doppler effect causes a differentfrequency of sound to be heard by a stationary observer.What is a requirement for the Doppler effect to occur?A a source that is moving as it produces the sound waveB a source that produces a polarised sound waveC a source that produces a sound wave of changing amplitudeD a source that produces a sound wave of changing frequency

The time taken by a vibrating body to move from one extreme position to the other extreme position is 0.2 s. If the distance between adjacent crests is 4m, write the steps to determine the wave velocity in proper sequence.(a) Determine the frequency of the wave (f).(b) Note down the wavelength (λ).(c) Note down the time period (T).(d) Determine the velocity of the wave as v = fλ.

A ship anchored in a port has a ladder which hangs over the side. The length of the ladder is 200cm, the distance between each rung in 20cm and the bottom rung touches the water. The tide rises at a rate of 10cm an hour. When will the water reach the fifth rung?

A floating leaf bobs up and down two complete cycles each second as water waves pass by five meters apart. How fast are the waves moving?Group of answer choices10 m/s20 m/s30 m/s40 m/s

A sound wave travels from air into water.  In air, the sound wave travels at a speed of 340 m/s and has a wavelength of 20 m, and in water, it travels at a speed of 1500 m/s.  Calculate the wavelength of the sound wave in water.88.24 m4.53 m0.01 m25,500 m

Ocean waves approaching the shore can be described as sinusoidal periodic waves with amplitude 4.4 m and wavelength 3.8 m.Two swimmers are in the ocean, with swimmer C 2.4 m further offshore than swimmer D. If at some instant in time swimmer C is at the crest of the wave, how far below swimmer C  will swimmer D be at the same time?Give your answer in metres.