Two sailors are trying not to get seasick as their ship plows through waves on the ocean. They notice the ship bobs up (crest), back down again (trough), and back up (next crest) every 4 seconds.If the speed of these waves relative to the ship is 3 m/s, how far apart are the wave crests (in meters)?

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.

A SONAR on a ship sends a signal to the ocean floor and receives the reflected signal.The speed of the signal in water is 1400 metres per second.The ocean floor is 7 kilometres below the ship. Question promptHow long will the signal take to go to the ocean floor and come back to the ship?

Betty is sitting on of her surfboard out in the ocean. She is waiting for the perfect wave to come along so she can ride it in to shore. As she waits, she notices that the waves roll by in patterns, or sets. As Betty waits, she counts the number of waves that pass her during a 1-second period; she counts just 1. She estimates that the distance between crests is 6 meters. Betty sees the perfect wave and begins paddling. She pushes herself up, stands on the surfboard and rides the wave all the way in to shore, a distance of about 60 meters. It takes her about 10 seconds to ride the wave in. Use two methods to calculate the speed of the wave based on the information presented. Are they the same? Explain how you got your answers.

A ship uses pulses of sound to measure the depth of the sea beneath the ship. A sound pulseis transmitted into the sea and the echo from the sea-bed is received after 54 ms. The speedof sound in seawater is 1500 m / s.Calculate the depth of the sea beneath the ship

A submarine emits a SONAR pulse which return from an under water cliff in 1.05 second. If speed of sound in salt water is 1531 m/sec. How far away is the cliff.Select an answerA803.7 mB765.5 mC1568 mD1607.4 m