Which equation describes an ocean swell travelling towards increasing x axis with an amplitude of 0.5 m, a period of 20 s and a wavelength of 50 m under the condition that, when a stopwatch stated timing, the sea was momentarily undisturbed and rising. Oy=0.5 sin(xt - 50) O y = 0.5 sin(-) Oy=2 sin(-) Ov=0.5 sin(nt - **) Oy=0.5 sin(xt) Question 28 Two waves of identical frequencies and different amplitudes arriving at the same point exactly in- phase. y₁ = cos(2n ft) 9/₂=== =2cos(2 ft) Which equation describes the resultant wave? Oy=-3cos(ft) Oy=3cos(2 ft) Oy=4cos (2n ft) Oy=2cos(2πft) Oy=-2cos(2 ft)

Which equation describes an ocean swell travelling towards increasing x axis with an amplitude of 0.5 m, a period of 20 s and a wavelength of 50 m under the condition that, when a stopwatch stated timing, the sea was momentarily undisturbed and rising. Oy=0.5 sin(xt - 50) O y = 0.5 sin(-) Oy=2 sin(-) Ov=0.5 sin(nt - **) Oy=0.5 sin(xt) Question 28 Two waves of identical frequencies and different amplitudes arriving at the same point exactly in- phase. y₁ = cos(2n ft) 9/₂=== =2cos(2 ft) Which equation describes the resultant wave? Oy=-3cos(ft) Oy=3cos(2 ft) Oy=4cos (2n ft) Oy=2cos(2πft) Oy=-2cos(2 ft)