The apparent wind's speed can be zero, but...

Question 1 / 2066636ee928f7522a1c519143

Question 1 of 2066636ee928f7522a1c519143

The apparent wind's speed can be zero, but only when two conditions are present. One condition is that the true __________.

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Question 1 of 20

66636ee928f7522a1c519143

The apparent wind's speed can be zero, but only when two conditions are present. One condition is that the true __________.

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🔍 Key Concepts

• apparent wind vs. true wind – how the wind you feel on deck is a combination of real wind and the vessel’s motion • vector subtraction – apparent wind is true wind minus the ship’s motion through the water • conditions for zero apparent wind – when two equal and opposite effects cancel each other

💭 Think About

• Imagine you are standing on deck underway: what has to be true about the real wind and your ship’s motion so that you feel no wind at all? • Think of the true wind as one arrow and the ship’s motion as another arrow: what has to be true about their lengths (speeds) and directions for the result to be zero? • Which option describes something that could be ONE of those two needed conditions, without by itself guaranteeing zero apparent wind?

✅ Before You Answer

• Be sure the choice can be true on a moving ship and still lead to zero apparent wind when combined with the correct direction condition. • Check whether the option talks about speed or direction and ask: is that something that could be just one of the two required conditions? • Eliminate any answer that would make the apparent wind obviously stronger instead of zero when the ship is moving (think about wind from dead ahead).

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Question 1 of 20

The apparent wind's speed can be zero, but only when two conditions are present. One condition is that the true __________.

wind must be from dead ahead

wind's speed equals the ship's speed

wind must be on the beam

wind's speed must be zero

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Question 1 / 2066636ee928f7522a1c519143

Question 1 of 2066636ee928f7522a1c519143

The apparent wind's speed can be zero, but only when two conditions are present. One condition is that the true __________.

Back

Question 1 of 20

66636ee928f7522a1c519143

The apparent wind's speed can be zero, but only when two conditions are present. One condition is that the true __________.

No comments yet

Be the first to share your thoughts!

If the question has a related picture, it will appear here.

🔍 Key Concepts

💭 Think About

✅ Before You Answer

👋 Hi! I'm Genie, your AI study assistant. How can I help you with this question?

Quick actions

— No credit card needed