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laila [671]
3 years ago
11

A dog whistle uses a frequency higher than humans can normally hear. A pet owner wants to test his dog whistle. The owner has a

helper drive a car and blow the whistle while he stands on the sidewalk. In which direction should the driver drive so that the pet owner can hear it and why?
Physics
2 answers:
leva [86]3 years ago
4 0

Answer: The driver should drive away from the pet owner.

Explanation:

The apparent frequency reduces when the source and listener are relatively moving away from each other and increases when they are moving towards each other. This from the Doppler's effect.  Thus, driver should drive away from the pet owner so that the apparent frequency decreases and can be heard by the pet owner.

Nutka1998 [239]3 years ago
4 0

Answer:

He should drive in the opposite direction of the owner.

Explanation:

This can be understood by the Doppler Effect. According to this effect the frequency of an approaching wave increase while the frequency of the wave will decrease if it recedes.

For example when you hear a siren of an ambulance, the pitch of the siren increase as it moves towards you because there is an increase in frequency. When the ambulance moves from you the pitch will decrease because the frequency of the sound wave from siren will decrease.

In the given case, to hear the sound of the whistle driver need to move away from it so that the frequency is decreased and he will be able to hear it. So the driver will need to drive in the opposite direction of the owner.

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Plz help with these 5 The backbone is made up of 26 small bones called ___________. What are the characteristics of bones? (list
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Answer:

The backbone, spine or vertebral column is made up of 26 small bones called the vertebrae.

The characteristics of bones include:

1. They are strong and rigid

2. They are composed of bone cells called osteocytes.

3. They are lightweight

4. They have a honeycomb-like matrix internally, which helps to give them rigidity.

5. They exist in various types and shapes.

6. They have the ability to grow and repair when damaged

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Explanation:

The backbone, spine or vertebral column is made up of 26 small bones called the vertebrae. The 26 small bones include 24 separate vertebrae interspaced with cartilage, and then additionally the sacrum and coccyx. The vertebral column is divided into five regions: cervical, thoracic, lumbar, sacral and coccygeal regions.

A bone is a rigid tissue that is part of the skeleton in vertebrate animals. The characteristics of bones include:

1. They are strong and rigid

2. They are composed of bone cells called osteocytes.

3. They are lightweight

4. They have a honeycomb-like matrix internally, which helps to give them rigidity.

5. They exist in various types and shapes.

6. They have the ability to grow and repair when damaged

7. They contain inorganic minerals such as calcium and phosphate

Joints are the junctions where two bones meet. They serve various functions which include allowing for movement of the body and binding the skeleton together.

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Ligaments are bands of tough elastic fibrous tissue around that found around the joints whose function is to link bone to bone, give support to joints as well as limit their movement.

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3 years ago
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amid [387]

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Answer:

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Explanation:

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