Hot coffee in a vacuum flask (thermos) is an example of what type of system?

Answers

Answer 1

Final answer:

Hot coffee in a vacuum flask (thermos) is considered an approximation of an isolated system in chemistry, which is designed to significantly slow down heat transfer but not completely prevent it.

Explanation:

Hot coffee in a vacuum flask, also known as a thermos, is an example of an isolated system in chemistry.

An isolated system is defined as one that does not allow the transfer of energy or matter into or out of the system.

While no system can be perfectly isolated due to eventual heat transfer to the surroundings, a thermos with hot coffee is a good approximation because it is designed to significantly slow down heat transfer, thanks to its vacuum insulation and other features like reflective walls.

Over time, however, even in a thermos, the coffee will cool as some heat is lost to the surroundings, illustrating that a truly isolated system does not exist but can be approximated for practical purposes.


Related Questions

Treatment o phonic tics in patients with tourette's syndrome using botulinum toxin type
a.

Answers

A study by Porta et. al (2004), showed that the injection of Botulinum toxin Type A (2.5 IU BTX-A (BOTOX; Allergan)) in both vocal cords of Tourette patients improved the vocal tics in 93% of the patients after the tretment, with 50% of them being tic-free. The mean response time was 5.8 days, while the mean duration of response reached up to 102 days. A side effect of the treatment however, was hypophonia (experienced by 80% of the patients). Hypophonia refers to soft speech often resulting from lack of vocal muscle coordination.

A 28 year old female presents with severe chest pain and shortness of breath. she is diagnosed with pulmonary embolism. which is most likely the source of the embolism

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the pulmonary embolism is due to her heart not pumping correctly

What accounts for the ability of vesicles to fuse with different membrane compartments in the cell?

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The phospholipid bilayer has a fluid makeup, so this allows vesicles to go from one part of the cell to another and fuse with those areas. The vesicles then go into these areas and deposit the needed substances or pick up waste products from these areas in order to remove them from the cell.

The ___ ____ sphincter provides voluntary control over the voiding of urine.

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internal urethral . I believe is the answer you are looking for.

Abiotic factors are living components of an ecosystem. true or false

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False. Abiotic factors are non-living

What structures help prevent medial or lateral displacement of the talus?

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Ligaments.

The anterior talofibular ligament (ATFL) is a ligament that prevents medial and anterior displacement of the talus.

The Calcaneofibular ligament prevents lateral displacement. connects the talus and calcaneus providing with stabilization in the ankle joint and subtalar joint.

This two ligaments are often associated with sprained ankles.


The membrane proteins that change shape and bind with specific molecules to transport them across the cell membrane are ________.

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Answer: carrier proteins

Explanation:

With gastric distention, a horse's stomach can rupture if treatment is not in time.
a. True
b. False

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The answer is a. True

Answer: A true

Explanation:

The bone building cells, once active, produce osteoid which is predominantly made up of the protein

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The cell that is being described in the sentence above is the osteoblast as this is the bone building cell that is responsible of making up the bone that maintains its balance and form in the bones as it is present and important.

Which of the following are not part of nonspecific defenses against infection?

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it would be inflammatory responses

Identify one adaptation of deer that would help them to survive an populated by wolves

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More vegetation and water

What Is The building blocks of lipid

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The building blocks of lipids are glycerol and fatty acids. However, triglycerol is only one type of lipid. Lipid is a large and broad class that also includes steroids, glycerophospholipid, and more.

"describe the risks associated with drinking alcohol as a teenager"

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From there, it affects the central nervous system (the brain and spinal cord), which controls virtually all body functions. Because experts now know that the human brain is still developing during our teens, scientists are researching the effectsdrinking alcohol can have on the teen brain.

When an antigen attacks the body, it activates adaptive immunity. This adaptive immunity produces a strong response when it encounters the same antigen for the second time. Which feature of adaptive immunity is essential for this kind of response?

A) the ability to remember the antigen it encounters

B) the ability to distinguish between self and nonself antigens

C) the ability to produce nonspecific antibodies against the foreign antigen

D) the ability to secrete lysozymes against pathogenic antigens

Answers

A) the ability to remember the antigen it encounters

Adaptative immunity reacts in a more general way producing nonspecific antibodies against the foreign antigen when the organism is first attacked by that foreign antigen. The second time around, when the organism is faced again with the same foreign antigen, it produces a much stronger response because it memorised the antigen and is not strange anymore so the response can be more specific, quicker, and effective.

A recent study has shown an increase in the number of predators in an ecosystem. What is not a possible cause of growth

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where are the options ?

Answer:

an increase in the number of predator's

Explanation:

How does the central vacuole of a plant cell allow the plant to stand up right wilt?

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Large centrally located vacuole is the characteristic feature of a plant cell. It is a single membrane bound sac like structure that provide structural support to the cell. It also controls turgor pressure. It stores water inside that keeps the plant to stand still. When the plant is fully hydrated, the central vacuole is filled with water and the membrane of the vacuole pushes against the cell wall. this increases the turgor pressure inside the plant cell and the plant cell stands stiff in an upright position.

Answer: Large centrally located vacuole is the characteristic feature of a plant cell. It is a single membrane bound sac like structure that provide structural support to the cell. It also controls turgor pressure. It stores water inside that keeps the plant to stand still. When the plant is fully hydrated, the central vacuole is filled with water and the membrane of the vacuole pushes against the cell wall. this increases the turgor pressure inside the plant cell and the plant cell stands stiff in an upright position.

Explanation:

Which muscle is not part of the rotator cuff?

Answers

The four muscles of the rotator cuff are the supraspinatus, infraspinatua, teres, and subcapularis. Hope this helps!
Final answer:

The deltoid muscle, among others like the rhomboids and latissimus dorsi, are not part of the rotator cuff. The rotator cuff consists of the tendons of four specific muscles: the deep subscapularis, supraspinatus, infraspinatus, and teres minor.

Explanation:

The rotator cuff is an important component of the shoulder joint formed by tendons of four muscles, specifically the deep subscapularis, supraspinatus, infraspinatus, and teres minor. These muscles arise from the scapula and attach to the humerus, providing essential structural support and allowing a range of movements. However, the deltoid muscle, which originates on the scapula, is not a part of the rotator cuff though it plays a significant role in the motion of the shoulder, facilitating actions such as flexing, medial rotation, extension, and lateral rotation of the arm.

Other muscles that are not part of the rotator cuff, but vital to the movement of the upper limb, include the rhomboids, trapezius, latissimus dorsi, brachioradialis, extensor carpi radialis, and extensor digitorum amongst others. While these muscles contribute to the flexibility and strength of the upper limb, they do not form the rotator cuff.

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As DNA is replicated, which DNA base pair will bond to cytosine?
adenine
thymine
cytosine
guanine

Answers

Answer:

The correct answer would be guanine.

It can be explained with the help of base-pair complementary rule which states that adenine will always base-pair with thymine and guanine will always base-pair with cytosine.  

Adenine bonds with thymine through two hydrogen bonds and guanine bonds with cytosine through three hydrogen bonds.

As DNA is replicated, the DNA base pair that will bond to cytosine is Guanine. More information about DNA replication is found below.

What is DNA replication?

DNA replication is the process whereby DNA molecule is duplicated to form two identical copies.

DNA is made up of monomers called nucleotides. The four nucleotides are as follows:

AdenineGuanineCytosineThymine

In the DNA molecule, the following bonding of nucleotides applies:

Adenine bonds Thymine

Cytosine bonds Guanine

Therefore, as DNA is replicated, the DNA base pair that will bond to cytosine is Guanine.

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List the three main stages of cellular respiration in order. where does each stage take place in the cell?

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1-glycolisis -takes place in the cell cytoplasm
2-krebs cycle- matrix space
3-reapiratory electron transport chain- cristae

Pyruvate is similar to ___
-carbon dioxide
-oxygen
-nucleic acids
-Lactic acid

Answers

Pyruvate is similar to lactic acid because they are similar in their chemical formulas. Pyruvate has a chemical formula of CH3COCOO and lactic acid has a formula of C3H6O3. Since these are similar in formula, pyruvate and lactic acid are similar.

If a man is confused and usually thinks that he is king david (old testament), and if his psychiatrist ordered medication, it would most likely be:

Answers

antipsychotic drug because  they are used to treat patients with symptoms of psychosis, delusion, hallucination, confusion, and paranoia.

How is the activity of a riboswitch controlled? metabolite binding can change its structure?

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The riboswitch is controlled by a negative control in which is analogous. Yes, metabolite binding can change its structure because it is needed there is a presence of conformation changes in which will effect the gene expression and the RNA structure.

The nurse is assessing a client with retinal detachment. the nurse should assess the client for:

Answers

If a client has retinal detachment, there is a high probability that they will report light flashes and floaters in front of the eye. This is a common occurrence with people with retinal detachment - they may have difficulty with their peripheral vision, and this detachment can lead to more serious issues, such as glaucoma or cataract. 

The nurse should assess for sudden flashes of light, floaters, visual field changes, blurred vision, and pain or discomfort.

Visual symptoms: The nurse should assess the client for sudden onset flashes of light, floaters (spots or specks that float in the field of vision), or a sudden increase in the number of floaters.

Visual field changes: The nurse should inquire about or observe any peripheral vision loss, shadow-like curtain, or veil covering part of the visual field.

Blurred or distorted vision: The nurse should ask the client about any changes in vision clarity or distortion of straight lines or objects.

Reduced central vision: The nurse should assess for a sudden or gradual decrease in central vision acuity.

Pain or discomfort: The nurse should inquire about any eye pain, discomfort, or pressure, which may occur with retinal detachment, especially if associated with other visual symptoms.

Complete question:- The nurse is assessing a client with retinal detachment. The nurse should assess the client for which of the following signs and symptoms indicative of retinal detachment?

Why do you think it is important for a surgical patient to have someone drive him or her home after surgery?

Answers

they might still be under the influence of medication given to them during the surgery. no one under the influence should drive. it is a safety hazard for them to drive

The gap between two communicating neurons is termed:

Answers

Is the synaptic cleft. Hope this helps!:)
Final answer:

The gap between two communicating neurons is termed as the synaptic cleft. This gap acts as the communication link where the transmission of information occurs from one neuron to another

Explanation:

The gap between two communicating neurons is termed as the synaptic cleft. In neuroscience, a neuron is a specialized type of cell which plays a vital role in the function of the nervous system to transmit information to different parts of the body. The synaptic cleft, also known as synaptic gap, acts as the communication link where the transmission of information occurs from one neuron to another using chemical messengers called neurotransmitters. It is by this process that signals from the brain are sent to different parts of our body, allowing us to respond to stimuli.

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Write an analogy to explain why cell size is limited

Answers

Cell is the structural and functional unit of life. All living organisms are made up of cells. The size of any living cell is limited. Limited cell size has many advantages.

Answer: Analogy to explain why cell size is limited is SMALLER THE SIZE OF A CELL LARGER WILL BE THE SURFACE AREA TO VOLUME RATIO.

Final answer:

Cell size is limited because as a cell grows, its surface area to volume ratio becomes less favorable for efficient diffusion of nutrients and waste, similar to transportation issues in an overly large city. Cells remain small or adapt by becoming flat to maintain efficient diffusion and cellular function.

Explanation:

An analogy that explains why cell size is limited can be thought of in terms of a city. If the city (cell) is too large, transportation (diffusion of nutrients and waste) becomes inefficient, and the central areas (the center of the cell) may not receive the necessary resources or be able to dispose of waste effectively. This inefficiency of resource travel limits the size of the city, just as it restricts the growth of a cell.

The limitations of cell size are primarily due to the surface area to volume ratio, which determines how effectively substances can enter and leave a cell. As a cell grows, its volume increases faster than its surface area, making it challenging to transport substances across the cell membrane efficiently. Therefore, cells have adapted to remain small or flat to maintain a sufficient surface area to volume ratio, allowing for efficient diffusion and cellular function.

Overall, to function optimally, cells must maintain a size that supports quick and effective diffusion of nutrients and waste. This is why most organisms, even very large ones, are made up of tiny cells instead of smaller ones.

A researcher recorded eight different species of bumble bees in the grasslands of Arkansas. Each species is present in large numbers. Which reason most likely explains the diversity of bumble bees in the grasslands ?

Answers

Bumblebees are the pollinators that are declining in numbers due to destruction of grasslands. Bumblebees require flowering plants for their growth and multiplication as these suck nectar from the flowers. The nectar is used to make honey that acts as food for the bumblebee colony. They also make their nests in the flower-rich grasslands. Thus, grasslands act as habitat for the bumblebees and this is the reason why they are found in abundance in the grasslands.
Final answer:

The diversity of bumble bees in the grasslands of Arkansas is likely explained by the presence of different floral resources, suitable nesting sites, and the absence of major limiting factors.

Explanation:

The diversity of bumble bees in the grasslands of Arkansas is likely explained by several factors. One possible reason is the presence of different floral resources in the grasslands. Bumble bees rely on flowers for food, and different species of bumble bees may have different preferences for specific types of flowers. The presence of a variety of floral resources can attract and support a diverse community of bumble bees.

Another factor that may contribute to the diversity of bumble bees in the grasslands is the presence of suitable nesting sites. Bumble bees require suitable locations to build their nests and raise their young. The grasslands may provide a range of nesting opportunities, such as underground burrows or abandoned rodent nests, which can support multiple species of bumble bees.

Lastly, the absence of major factors limiting bumble bee populations, such as pesticide use or habitat destruction, may also contribute to the high diversity of bumble bees in the grasslands. When bumble bees are not threatened by these negative influences, they have the opportunity to establish and maintain diverse populations.

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Dr. carl simonton is credited with introducing art therapy for his patients diagnosed with:

Answers

Dr. Carl Simonton is introducing art therapy used for Post traumatic stress disorder patient with psychological problems. Art therapy is a form of expressive therapy that uses the creative process of making art to improve a person’s physical, mental, and emotional well-being. Art therapy stands in contrast with other kinds of creative or expressive arts therapies that use dance, music or drama. ... However, the potential healing power of art therapy has not been thoroughly studied in certain patients, such as trauma victims with disorders such as PTSD. Post traumatic stress disorder

Final answer:

The question conflates Dr. Carl Simonton's work with art therapy. Dr. Carl Simonton specialized in oncology, while Carl Rogers developed the client-centered therapy that integrates art therapy in psychological practice, proving effective for various patients, including those with ASD.

Explanation:

While the question mentions Dr. Carl Simonton and art therapy, there seems to be a mix-up in names. The question possibly confuses Dr. Simonton's work with the broader field of art therapy. Dr. Carl Simonton was known for his groundbreaking work in psychosocial oncology, particularly regarding the emotional and psychological support for cancer patients. However, it is Carl Rogers, not Dr. Simonton, who is renowned for developing a client-centered therapeutic method that has been influential in clinical settings, including the integration of creative arts therapies.

Art therapy, as recognized in modern mental health practices, involves using art and creative mediums as a form of psychological and emotional therapy. Art can serve as an avenue for expression, communication, and exploration of feelings, particularly for individuals who find it challenging to articulate their thoughts and emotions verbally. This form of therapy has shown effectiveness in various groups, including those with Autism Spectrum Disorders (ASD), as highlighted by research examining clinical case descriptions.

In summary, while Dr. Simonton's contributions to cancer patient support are invaluable, the introduction and integration of art therapy in clinical settings are part of a broader movement within psychological treatment approaches, emphasizing the therapeutic benefits of creative expression and the non-directive, client-centered approach championed by Carl Rogers.

The _____ is a structure that gathers, stores, and releases energy.

Answers

The answer is Mitochondria

Which action would be completed by skeletal muscle tissue? digesting lunch moving blood through arteries increasing the heartbeat kicking a soccer ball

Answers

The answer would be 
D) Kicking a soccer ball
Skeletal muscle controls just about all of your body movement. When you are digesting lunch you are not moving. When your body is moving blood through arteries, your body is not moving. When your heartbeat is increasing you are not moving. But when you move to kick a soccer ball you are moving. Thats why this action would be completed by skeletal muscles.
The answer would be d
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