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Airida [17]
3 years ago
7

Which applications, either for diagnostic purposes or for therapeutic purposes, do not involve ionizing radiation? Check all tha

t apply. CT scan MRI ultrasound laser surgery radiopharmaceuticals PET scan
Physics
2 answers:
Umnica [9.8K]3 years ago
8 0

Answer:

Applications in which ionizing radiation are not used are  

 MRI

ultrasound

 laser surgery

Explanation:

Ionizing radiation

Ionizing radiations are radiation which have sufficien energy to ionize an atom. Example of ionizing radiation are x rays, gamma rays and all particle radiation from radioactive decay

CT Scan

CT scan is an abbreviated form of computerized tomography. CT scan provide more information about a body than x-rays. In this test a sequence of x-ray images are taken at various angle of a body and these images after computer processing  provide information about the body. Since x-ray is ionizing radiation so in CT scan ionizing radiations are used.

Ultrasound

In ultra sound scan high frequency sound waves(which are not ionizing radiation) are used to find the information about a body.

MRI

MRI is an abbreviated form of Magnetic resonance imaging. In MRI scanning high intensity magnetic field and radio waves(which are not ionizing radiation) are used to find the information of a body.

Laser surgery

It is a type of surgery in which laser beam(which are not ionizing radiation) is used to cut the skin or to remove a lesion from skin surface.

Radiopharmaceuticals PET scan

PET scan is an abbreviated form of positron emission tomography scan. This test is used to find the images of a body to detect certain diseases like cancer and heart diseases in your body.  In this test radioactive tracers are used. In this test ionizing radiation are used.

neonofarm [45]3 years ago
5 0

These applications DO NOT INVOLVE harmful ionizing energy:

- MRI

- ultrasound

- laser surgery

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Define the types of friction and give FOUR examples of each
Verdich [7]

Answer:

Static Friction - acts on objects when they are resting on a surface

Sliding Friction -  friction that acts on objects when they are sliding over a surface

Rolling Friction - friction that acts on objects when they are rolling over a surface

Fluid Friction - friction that acts on objects that are moving through a fluid

Explanation:

Examples of static include papers on a tabletop, towel hanging on a rack, bookmark in a book , car parked on a hill.

Example of sliding include sledding, pushing an object across a surface, rubbing one's hands together, a car sliding on ice.

Examples of rolling include truck tires, ball bearings, bike wheels, and car tires.

Examples of fluid include water pushing against a swimmer's body as they move through it , the movement of your coffee as you stir it with a spoon,  sucking water through a straw, submarine moving through water.

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3 years ago
The particles in an object move in (many/ two directions)
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Answer:

They are negitive

Explanation:

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3 years ago
A bird is about 6.26.2 in.​ long, with a​ thin, dark bill and a​ wide, white wing stripe. If the bird can fly 9292 mi with the w
Trava [24]

Answer:

209 mph

Explanation:

V = Speed of bird in still air

v = Speed of wind = 44 mph

Consider the motion of the bird with the wind

D_{1} = distance traveled with the wind = 9292 mi

t_{1} = time taken to travel the distance with wind

Time taken to travel the distance with wind is given as

t_{1} = \frac{D_{1}}{V + v}

t_{1} = \frac{9292}{V + 44}                              eq-1

Consider the motion of the bird with the wind

D_{2} = distance traveled against the wind = 6060 mi

t_{2} = time taken to travel the distance against wind

Time taken to travel the distance against wind is given as

t_{2} = \frac{D_{2}}{V + v}

t_{2} = \frac{6060}{V - 44}                              eq-2

As per the question,

Time taken with the wind = Time taken against the wind

t_{1} = t_{2}

\frac{9292}{V + 44} = \frac{6060}{V - 44}

(9292) (V - 44) = (6060) (V + 44)

9292V - 408848 = 6060V + 266640

3232V = 675488

V = 209 mph

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2 years ago
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Answer: Mechanical waves

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Mechanical waves require a medium in order to transport their energy from one location to another. A sound wave is an example of a mechanical wave. Sound waves are incapable of traveling through a vacuum.

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