In ultrasound physics, which of the following is improved by increasing packet size ?

Answers

Answer 1

Answer:
You're going to have to give me the choices.
I'm pretty sketchy on that subject.

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A graduated cylinder has 20 ml (cm3) of water placed in it. An irregularly shaped rock is then dropped in the graduated cylinder and the volume of the rock and water in the cylinder now reads 30 ml (cm3). The mass of the rock dropped into the graduated cylinder is 23 grams.a.) Find the volume of the rock dropped into the graduated cylinder. b.) Find the density of the rock dropped into the graduated cylinder.

If a black hole is truly black and has an escape velocity greater than the speed of light such that no light can escape it, where do the X-rays come from in the black hole candidates so far identified?

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Explanation:

The X- rays are not emitted by the black hole itself but by the from hot gas orbiting around the black hole forming a disc known as accretion disk. When a black hole rips apart a star it attracts gases towards it. The pressure that is generated in the gas heats it up to millions of degrees thus emitting radiation among which x rays are also present which are detected by radio telescopes on the earth.

Matter is anything that

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takes place in the space and it can be fluid or solid

When describing a maritime polar air mass, you might say it formed over _____ and is _____.

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The correct answer for the question that is being presented above is this one: "an air mass that formed over land. it is cold and dry." When describing a maritime polar air mass, you might say it formed over land and is cold and dry. It's temperature can range from around freezing to near 20 degrees Celsius

Answer:

water, cold and moist

Explanation:

I just did a test on it and got it wrong using land, cold and dry and got it right using this anwer

a block that is 80 degrees is places next to a 20 degree block. the warmer block heats the cooler block by the process of... A)convection. B)conduction. C) a and b. D) neither a or b

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Answer: option B: conduction.

Conduction is the heat transfer that happens between two bodies in direct contact, due to the collision of the molecules, atoms and electrons within the body (microscopical level).

What is a quantity Described completely by its magnitude

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Answer:

Scalar

Explanation:

A physical quantity that is completely described by its magnitude; examples of scalars are volume, density, speed, energy, mass, and time. Other quantities, such as force and velocity, have both magnitude and direction and are called vectors.

A pole that is 2.9m tall casts a shadow that is 1.32m long. at the same time, a nearby tower casts a shadow that is 37.75m long. how tall is the tower? round your answer to the nearest meter.

Answers

$(2.9)/(1.32)$ = $(x)/(37.75)$

x = 82.93 m

Nothing to deal with physics.
Maths. Scale factor. Year 9.

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The material through which a mechanical wave travels is

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