BIO Quenching an MRI Magnet. Magnets carrying very large currents are used to produce the uniform, large-magnitude magnetic fields that are required for
magnetic resonance imaging (MRI). A typical MRI magnet may be a solenoid that is 2.0 m long and 1.0 m in diameter, has a self-inductance of 4.4 H, and carries a current of 750 A. A normal wire carrying that much current would dissipate a great deal of electrical power as heat, so most MRI magnets are made with coils of superconducting wire cooled by liquid helium at a temperature just under its boiling point (4.2 K). After a current is established in the wire, the power supply is disconnected and the magnet leads are shorted together through a piece of superconductor so that the current flows without resistance as long as the liquid helium keeps the magnet cold.

Under rare circumstances, a small segment of the magnet’s wire may lose its superconducting properties and develop resistance. In this segment, electrical energy is converted to thermal energy, which can boil off some of the liquid helium. More of the wire then warms up and loses its superconducting properties, thus dissipating even more energy as heat. Because the latent heat of vaporization of liquid helium is quite low (20.9 kJ/kg), once the wire begins to warm up, all of the liquid helium may boil off rapidly. This event, called a quench, can damage the magnet. Also, a large volume of helium gas is generated as the liquid helium boils off, causing an asphyxiation hazard, and the resulting rapid pressure buildup can lead to an explosion. You can see how important it is to keep the wire resistance in an MRI magnet at zero and to have devices that detect a quench and shut down the current immediately.


How many turns does this typical MRI magnet have?
(a) 1100;
(b) 3000;
(c) 4000;
(d) 22,000.

When current-carrying wire with many loops is connected across the battery, the magnetic field is created in the wire. A current-carrying wire with many loops is called a Solenoid.

The current is the stream of electrons flowing from positive terminal of the battery to the negative terminal so as to generate electricity. When the current flow through wire is bent into the shape of circle and continued making several loops. This wire form is called Solenoid.

More of the wire then warms up and loses its superconducting properties, thus dissipating even more energy as heat. Because the latent heat of vaporization of liquid helium is quite low (20.9 kJ/kg), once the wire begins to warm up, all of the liquid helium may boil off rapidly.

A large volume of helium gas is generated as the liquid helium boils off, causing an asphyxiation hazard, and the resulting rapid pressure buildup can lead to an explosion.

Thus, a current-carrying wire with many loops is called a Solenoid.

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"The human body. It is an organism. It is made up of cells, tissues, organs, and organ systems," said Ms. Garcia to her students. "I can
see tissues, my skin!' said Allie. "But how do I know I am made of cells too?' The students carried out an experiment to prove to Allie
that they were indeed made of cells. Here is a photo of their lab activity. What did they do?
A) They took a piece of the skin from their fingertips and looked at the tissue using a magnifying glass.
B) They dissected their finger tips! They pulled off a piece of skin and looked at it with the dissecting scope.
C) They scraped the inside of their cheek and smeared the end of the toothpick on a glass slide. They added a drop of stain and then looked at the slide using the light microscope.
D) They scraped the inside of their cheek and smeared the end of the toothpick on a glass slide. They added a drop of stain and then they used an IPhone to take a picture of the slide to share with the class.

The answer is C. The answer is C. The scraped the inside of her cheek and smeared the toothpick on a glass slide. They added a drop of stain and then looked at the slide using the light microscope. I took the USA Test Prep

PLEASE HELP , WILL GIVE BRAINLIEST. In Mendel’s first experiment, he crossed tall plants with short plants and found tall plants were dominant to short plants. Draw a Punnett square to describe this experiment and list the genotypes and phenotypes of the offspring.

How might the condition of a host affect how successful a pathogen is at causing disease?

I need to know the answer to this question please

Give a description of a recent 2018-2020 example of how human trafficking displayed itself in the community ​

What is the difference between acute and chronic poisoning

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(A) sexual
(B) gestation
(C) asexual
(D) metamorphosis​

How does genetics influence natural selection?

a food web is shown below. Which of the following organisms compete for the mouse as a food source?

Which statement best describes how a multicellular organism survives

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(B) Subarctic
(C) Temperate
(D)Tropical

suggest how the liver will metabolism alcohol when a person consumes red wine .

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HELP! A 20-kg bag of rice dropped from an airplane. What is the gravitational force on the bag? Acceleration due to gravity is 9.8 m/s/s.)
10.02 N

19.6 N

20.8 N

196 N

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What are the products of photosynthesis?

PLEASE HELP ME ASAP GIVING AWAY 13 POINTS!!!!!!!!!!

What is the name of the process where a scientist alters the characteristics of an organism by manipulating its DNA?

genetic engineering

animal engineering

mendelian engineering

mutation engineering

Just fill out the Punnett squares using the key that's provided, and plz don't answer with links, actually help me.... either do it on paper and take a pic, or something else, idec i just need to get this done quickly! thnx to those who actually do help me! (will give brainliest if you help me.)

Question 20 of 25
How are photosynthesis and cellular respiration related?
A. Cellular respiration is the process animals use to produce glucose,
while photosynthesis is the process plants use to produce
glucose.
B. The products of photosynthesis are the reactants of cellular
respiration
C. Cellular respiration provides the energy for photosynthesis.
O
D. Photosynthesis produces water molecules, while cellular
respiration splits water molecules apart.

What weather conditions would exist in El Paso based on the weather map seen here?
A)
cold temperatures, sunny skies.
B)
cold temperatures, cloudy skies
warm temperatures, very cloudy, and heavy rain.
D)
warm temperatures, increasing clouds, and showers.

Which type of rock forms from chemical reaction of minerals

The antlion is a ______

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equator
the tropics
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Are the nitrogenous bases just free floating in the nucleus? If so..why are they just floating? And how are they made? Thank you :)

What organisms play a similar role to earthworms in a forest?
Select all that apply.
dung beetle
jellyfish
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Down bad lmk

If the temperature of the tissue samples used in the experiment had been raised from 37°C (body temperature) to 50°C, the results would have been different because

20. Which of the following is NOT likely to be a limiting factor on the sea
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predation
competition
drought

hello please help i’ll give brainliest