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pochemuha
3 years ago
12

How do ultrasound waves clean jewellery

Biology
2 answers:
Talja [164]3 years ago
7 0

Answer:

They use ultrasound waves and chemicals combined to create bubbles that "cling" to the foreign particles such as dirt, oil, and unknown substances.

Explanation:

Ultrasonic cleaners are useful for jewelry cleaning and removing tarnish. They use ultrasound waves and chemicals combined to create bubbles that "cling" to the foreign particles such as dirt, oil, and unknown substances. The high frequency waves are sent out and pull the contaminants off the object.

Fiesta28 [93]3 years ago
4 0

Answer:

Ultrasound waves and chemicals are combined to create bubbles that "cling" to foreign particles such as dirt, oil or other unknown substances. The waves are sent out to extract these particles.

Explanation:

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James is making models of plant and animal cells using objects supplied by his teacher to represent organelles. For one cell, he
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Answer:

The correct answer will be option B.

Explanation:

Plant cell shows distinguishing features from the animal cell which can be easily observed like:

1. Shape: Plant cell is usually rectangular while the animal cell is circular.

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3. Vacuole: plant cell contains a single large vacuole whereas animal cell contains small vacuole if any.

4. Ribosomes: plant cell posses more free cytoplasmic ribosomes while animal cell contains more attached ribosomes.

On the basis of this, we can predict that James is preparing a plant cell with balloon shoeing large vacuole and marbles as ribosomes.

Thus, option B is the correct answer.

7 0
4 years ago
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3 years ago
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Card One
Margaret [11]

Answer:

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Explanation:

According to this question, John could smell the fragrance of his newly bought bottle of cologne all the way up the hall before he can even get into his bedroom, where he usually keeps it. However, he realizes when he got to his bedroom that he left the bottle of cologne uncovered.

The fragrance of the cologne that spreads from the bedroom all through the hall is as a result of SIMPLE DIFFUSION, a form of PASSIVE TRANSPORT. Diffusion is a form of passive transport in which molecules/fluids move from a region of high concentration to a region of low concentration until it is evenly spread. This is the case with John's cologne, which spread from the bedroom where the concentration is high to the hall, where it is low.

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3 years ago
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To learn more about lipases here

brainly.com/question/16496348

#SPJ4

6 0
2 years ago
Mrs. f has spider nevi, broken skin capillaries. normally, broken skin capillaries do not cause visible blemishes, but hers are
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