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Oksi-84 [34.3K]
3 years ago
14

To hear a train approaching from far away, why is it more convenient to put the ear to the track?

Physics
1 answer:
elena-s [515]3 years ago
7 0

Answer:

If you want to hear a train approaching from far away,it is more convenient to put the ear to the track.This is because sound can travel through railway track (solid ) faster than through air.

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What Does Psychological Development Refer To?
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Psychological development, the development of human beings' cognitive, emotional, intellectual, and social capabilities and functioning over the course of the life span, from infancy through old age. It is the subject matter of the discipline known as developmental psychology.

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What is the difference between an empirical issue and ethical issue? (sociology question)
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Answer:

When it comes to research questions, sociologists are best equipped to answer empirical questions. —those that can be answered by real experience in the real world—as opposed to ethical questions. —questions about which people have moral opinions and that may not be answerable in reference to the real world.

Explanation:

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3 years ago
Which sentence best explains a possible result of climate change on Earth? A. Cold regions will become less appealing to tourism
Alex17521 [72]

The sentence that best explains a possible result of climate change on Earth is : (B). Extreme heat, flooding, and drought will each increase crop yields.

<h3>Meaning of climate change</h3>

A climate can be defined as the weather pattern that is prolonged or long term in a geographical area

Climate change can now be said to be the change in the weather pattern that has been sustained in a particular geographic area for a long period of time

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3 0
2 years ago
Which one of the statements below is true about mechanical waves?
TEA [102]
They require a medium to travel through
5 0
2 years ago
3. What exerts a greater force on the table of 2 kg book lying flat or a 2 kg book on its
Darina [25.2K]

Answer:

A book on its side exerts a greater force.

Explanation:

Pressure = Force / Area

Assuming that 1kg = 10N

2kg = 20N

Area of book lying flat = 0.3m × 0.2m

                                     = 0.6m²

Pressure of book lying flat = 20N / 0.6m²

                                            = 30Pa (1 s.f.)

Area of book on its side = 0.2m × 0.05m

                                        = 0.01m²

Pressure of book on its side = 20N / 0.01m²

                                               = 2000Pa (1 s.f.)

Since 2000Pa (1 s.f.) > 30Pa (1 s.f.), a book on its side applies greater pressure than lying flat.

5 0
2 years ago
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