Why should you not stand close to a fast-moving train?
Correct answer: A. The fast-moving train creates a strong air pressure that can pull you towards it, risking serious injury.
- A. The fast-moving train creates a strong air pressure that can pull you towards it, risking serious injury.
- B. The train's speed might make you feel dizzy, potentially causing you to faint.
- C. Objects falling from the train could hit you due to the train's high velocity, causing injury.
- D. There is no real danger; it's just a safety guideline.
Explanation
When you stand close to a fast-moving train, the train's rapid movement creates a lower air pressure between the train and the person compared to the other side. According to Bernoulli's principle, this pressure difference results in a force that can pull a person towards the train, leading to a risk of accidents and injuries. Option A correctly identifies the primary danger associated with standing too close to a fast-moving train. Option B is incorrect because dizziness is not the main concern. Option C is incorrect as the falling objects are not the primary risk. Option D is incorrect because it ignores the real danger posed by air pressure differences.
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Scientific reasoning evaluates hypotheses through observations, variables, controls, measurements and experimental results. Questions involve identifying independent and dependent variables, recognising a fair test, interpreting tables or graphs, distinguishing evidence from opinion, and deciding whether data supports, rejects or leaves a hypothesis unresolved.
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