Answer:
the open ocean
Explanation:
i just took the test on edge
how many atoms are present in 4 molecules of NaOH?
Answer:
The approximate molar mass of NaOH is 40 g/mol. You have 4 g NaOH.
No. of moles of NaOH is given by
n=(Given mass)/(Molar mass)
= 4/40 = 0.1 mol
1 mol has 6.022 × 10^23 molecules.
Thus, 0.1 mol has 6.022 × 10^23 × 0.1 molecules i.e. 6.022 × 10^22 molecules.
Explanation:
Final answer:
There are 12 atoms in 4 molecules of NaOH.
Explanation:
To determine the number of atoms in 4 molecules of NaOH, we must first understand the chemical formula of NaOH. NaOH consists of one sodium atom (Na), one oxygen atom (O), and one hydrogen atom (H). To calculate the total number of atoms, we multiply the number of molecules (4) by the number of atoms in each molecule (3). Therefore, there are 12 atoms in 4 molecules of NaOH.
0.0045 cm or 0.0045 in. Larger quantity
Hello There!
0.0045 Inches are larger than centimeters.
How should the table be changed to correctly
distinguish between mechanical and electromagnetic
waves?
Earth
Earthquake waves and radiation waves need to
change places.
Light waves and X-ray waves need to change
places
Ocean waves and X-ray waves need to change
places.
Sound waves and light waves need to change
places.
Answer:
Sound waves and light waves need to change places.
Explanation:
The electromagnetic spectrum has 7 different types of waves with wave different wave lengths and frequencies. They include radio waves, micro waves, infrared eradication, visible light, ultraviolet, xrays, and gamma rays. They do not require a medium of air or water. Mechanical waves need air and water to spread.
Answer: Sound waves and light waves need to change
Explanation:-
Electromagnetic waves are waves which can travel through the vacuum. electromagnetic waves have electrical and magnetic component associated with them. They all travel with the speed of light.The energy transport through a medium involves the absorption and re emission of the wave energy by the atoms of the material. Example: Light waves, X rays, Radiation waves
Mechanical waves require a medium to travel so that they can transport their energy from one location to another. Example: Ocean waves, sound waves , Earthquake waves
Thus light waves are electromagnetic waves and sound waves are mechanical waves and thus should exchange places.
When a device is used in a circuit in which the voltage is 81 v The current flowing through the device is 3 A what is the resistance of The Device
Answer:
= 27Ω
Explanation:
The voltage of a device = Resistance × Current
V=RI
Making R the subject of the formula we have R= V/I
Thus resistance = Voltage/ Current
V= 81 V
I = 3 A
Using these values in the formula for resistance we can then find the resistance of the device as follows.
R = 81 V/ 3 A
= 27Ω
How many g of ice at 0 degrees celsius will be melted to water at 0 degrees celsius if the ice absorbs 20000 calories?
Answer:
250 gm
Explanation:
Latent heat of ice=80 calories /g
ice=20000÷80=250 gm
the molarity of a vinegar solution is 0.90m. calculate the nimber of acetic acis moles is 10 ml of the solution
Answer:
0.009 mol.
Explanation:
Molarity (M) is defined as the no. of moles of solute dissolved in a 1.0 L of the solution.M = (no. of moles of acetic acid)/(Volume of the solution (L)).
M = 0.9 M, Volume of the solution = 10.0 mL = 0.01 L.
∴ no. of moles of acetic acid = (M)(Volume of the solution (L)) = (0.9 M)(0.01 L) = 0.009 mol.
Answer:
The number of acetic acid moles is 0.0090 in 10 ml of the solution.
Explanation:
[tex]Molarity=\frac{Moles}{Volume (L)}[/tex]
Let the moles acetic acid in vinegar be n.
Molarity of the vinegar solution = 0.90 M
Volume of the vinegar solution = 10 mL = 0.010 L
1 mL = 0.001 L
[tex]0.90M=\frac{n}{0.010 L}[/tex]
[tex]n=0.90 M\times 0.010 L=0.0090 mol[/tex]
The number of acetic acid moles is 0.0090 in 10 ml of the solution.
According to Coulomb's law, how would the electrical force between particles change if the product of their electrical charge increased?
Answer:
there would be more charge in it
Explanation:
4786 Joules of heat are transferred to a 89.0 gram
sample of an unknown material, with an initial
temperature of 23.0°C. What is the specific heat of the
materialif the final temperature is 89.5 °C?
The specific heat of the material is calculated using the formula for heat transfer Q = mcΔT, rearranged to find the specific heat 'c' = Q / (m * ΔT). In this scenario, given the provided values, the specific heat is approximately 0.81 J/g°C.
Explanation:In this question, you are asked to find the specific heat of a material. Specific heat refers to the amount of heat required to raise the temperature of 1 gram of the substance by 1 degree Celsius. This is an intensive property of matter and is unique for each substance.
If we use the formula for heat transfer Q = mcΔT, where:
Q is the heat transferred (Joules) m is the mass (in grams) c is the specific heat (J/g°C) ΔT (delta T) is the change in temperature (°C)
Then, by rearranging the formula, the specific heat 'c' can be calculated using the formula c = Q / (m * ΔT).
In this case, the heat transferred Q is 4786 J, the mass m is 89.0 g, and the change in temperature ΔT is the final temperature minus the initial temperature (89.5°C - 23.0°C = 66.5°C).
Therefore, specific heat 'c' = 4786 J / (89.0 g * 66.5°C) = 0.81 J/g°C. Hence, the specific heat of the material is approximately 0.81 J/g°C.
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Mrs. DeFord wanted to know whether or not her students would do better on a quiz if she promised them candy.
She went to the library and read several studies about the effect of giving food to lab animals. She found out that if animals were given food as a reward for doing something, they usually did better the more reward they were given.
She figured that the more candy her students were promised, the better they would do on the quiz.
She had all of her classes participate in the experiment; there were four groups in all. Each group had the same number of boys and girls, they were all given the same quiz, they were all the same age, of the same ability, and they came from the same background.
The first group was not promised any candy. The second group was promised 1 candy bar if they did well on the quiz. The third group was promised 2 candy bars and the fourth group was promised 3 candy bars, for doing well on the quiz.
Group #1 got an average of 70% on the quiz. Group #2 got an average of 80%, Group #3 got an average of 90%, and Group #4 got an average of 95%.
Identify the following:
a. Independent Variable:
b. Dependent Variable:
c. Constants (at least 2):
d. Testable Question:
e. Hypothesis:
f. Formal Conclusion Statement (refer back to the hypothesis...accepted/rejected...because the data shows...):
Answer:
a.) Independent Variable: # of candy bars promised to each group
[ The Independent Varaiable is what you change in the experiment]
b.) Dependent Variable: Quiz Scores
[ The Dependent Variable is what you're testing in the experiment; what the experiment should affect]
c.) Constant(s): Same Quiz, same number of gender kids in each group, same age kids in each group, same ability, and same background. [and same time, I'm assuming.]
[Constants are what you keep the same in the experiment; what you're not changing.]
d.) Testable Question: Will promising kids candy make them do better on tests and quizzes? [or something along this lines of this]
[The Testable Question is what you're trying to find out in the experiment]
e.) Hypothesis: The more candy the students were promised, the better results Mrs. DeFord would get from them.
[The Hypothesis is what the person performing the experiment expects will happen; an educated guess]
f. Formal Conclusion: Data shows that kids who were promised more candy had a better average than kids who were promised less candy/none. Mrs. DeFord's hypothesis was correct, since she assumed the more candy the students were promised, the better they would do on the quiz.
[The Formal Conclusion is what you have learned from the experiment, and wether or not the hypothesis was correct or not.]
I hope this helps! :)
what are the coefficients to balance the following equation?
ba+br2=babr2
The coefficients to balance the given equation [tex]Ba + Br_2 \to BaBr_2[/tex] are [tex]1 Ba + 1 Br_2 \to1 BaBr_2[/tex] ,respectively.
Coefficients are used to balance chemical equations, ensuring that the number of atoms of each element is the same on both sides of the equation. Or a coefficient is a numerical value placed in front of a chemical formula or compound to indicate the relative number of molecules or atoms involved in a reaction.
To balance the chemical equation [tex]Ba + Br_2 \to BaBr_2[/tex] , we need to ensure that the number of atoms of each element is the same on both sides of the equation.
Here are the coefficients needed to balance the equation:
[tex]Ba + Br_2 \to BaBr_2[/tex]
[tex]1 Ba + 1 Br_2 \to1 BaBr_2[/tex]
Therefore, the coefficients to balance the given equation are:
[tex]1 Ba + 1 Br_2 \to1 BaBr_2[/tex].
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The (C6H14)2NH molecule represents a ----- amine.
Primary
Secondary
Tertiary
Answer:
Secondary .
Explanation:
Primary amine contains only one alkyl group.
Secondary amine contains two alkyl groups.
Tertiary amine contains three alkyl groups.
Since (C₆H₁₄)₂NH contains 2 alkyl groups.So, it is secondary amine.
Answer:
Secondary
Explanation:
Because of this amount of hydrogens being substituted, we can classify the amines in primary (R-NH2), secondary (R1R2NH) and tertiary (R1R2R3N) amines. In the primary amines, only one of the hydrogens is replaced by an organic radical, for example, in the following CH3 - NH2 molecule, in the secondary we have the substitution of two hydrogen atoms, as in the case of CH3 - NH - CH3 and in the tertiary all are replaced.
In the molecule (C6H14) 2NH, the bold part shows the substitution of two hydrogen, so we can classify the molecule as a secondary amine.
How much heat is absorbed when 90.5 g of ice is heated from -11.0 °C to 145.0 °C?
Please show work ❤️
Answer:
Q(total) = 283Kj
Explanation:
5 Heat Transitions …
Specific Heats => c(s) = 0.50cal/g∙⁰C, c(l) = 1.0 cal/g∙⁰C, c(g) = 0.48 cal/g∙⁰C
Phase Transition Constants => ΔHᵪ = Heat of Fusion = 80 cal/g; ΔHᵥ = Heat of Vaporization = 540cal/g
Note => Phase change regions => no temp. change occurs when 2 phases are in contact (melting and evaporation). Only when single phase substance exists (s, l or g) does temperature change occur. See heating curve for water diagram. The increasing slopes are temperature change regions and heat flow is given by Q =mcΔT. The horizontal slopes are phase changes ( melting & evaporation) and heat flow for each of those regions is given by Q = m·ΔH. Each transition energy is calculated individually (see below) and added to obtain the total heat flow needed.
Q = mcΔT for temperature change regions of the heating curve (single phase only)
Q = m∙ΔH for phase transition regions of the heating curve (2 phases in contact)
Solid (ice) => Melting Pt => Q(s) = mcΔT = (90.5g)(0.50cal/g∙⁰C)(11⁰C) = 478 cal
Melting (s/l) => Liquid (water) => Q(s/l) = m∙ΔHᵪ = (90.5g)(80cal/g) = 7240 cal
Liquid (water) => Boiling Pt => Q(l) = mcΔT = (90.5g)(1.0cal/g∙⁰C)(100⁰C) = 9050 cal
Boiling (l/g) => Gas (steam) => Q(l/g) = m∙ΔHᵥ = (90.5g)(540cal/g) = 48,870 cal
Gas (steam) => Steam @ 145⁰C => Q(g = mcΔT = (90.5g)(0.48cal/g∙⁰C)(45⁰C) = 2036 cal
Total Heat Transfer (Qᵤ) = Q(s) + Q(s/l) + Q(l) + Q(l/g) + Q(g)
= 478cal +7240cal + 9050 cal + 48,870cal + 2036cal
= 67,674 cal x 4.184 j/cal = 283,148 joules = 283 Kj
what is the popular use of lithium batteries
Answer:
Lithium batteries are well-known for powering our phones and the latest lightweight laptop computers.
Lithium batteries are popular because they are lightweight, provide a stable voltage, are long-lasting, and are capable of delivering a high amount of current, making them suitable for a variety of applications from consumer electronics to electric vehicles and medical devices.
Lithium batteries are among the most popular types of rechargeable batteries used today. They are commonly found in a wide range of portable electronic devices. Here are some key details about their use and why they are so popular:
Portable Electronic Devices: Lithium-ion batteries are widely used in devices such as smartphones, laptops, tablets, and digital cameras because of their ability to provide a large amount of current and maintain a nearly constant voltage as they discharge.Electric Vehicles: These batteries are also crucial in the development of electric and hybrid vehicles. They offer a high energy density, meaning they can store and release a large amount of energy per unit mass, which is essential for the range and performance of electric cars.Medical Devices: Specialized lithium-iodide batteries are used in long-life, critical medical devices such as pacemakers. These batteries are designed to last 15 or more years, providing reliable power over long periods.Lightweight and Rechargeable: One of the main advantages of lithium-ion batteries is their lightweight nature, which makes them ideal for portable devices. Additionally, they are rechargeable, which means they can be used multiple times, reducing the need for disposable batteries.Slow Self-Discharge: Lithium batteries have a slow self-discharge rate, which means they retain their charge even when not in use, making them convenient for devices that are used intermittently.the steps of the scientific method in order are (3 points) Purpose, Experiment, Hypothesis, Analysis, Conclusion Purpose, Hypothesis, Experiment, Analysis, Conclusion Hypothesis, Experiment, Analysis, Conclusion Purpose, Hypothesis, Experiment, Conclusion
Answer:
second one
Explanation:
13,000. cm has how many significant figures?
Answer:
since there is a decimal point at the end, they are all significant figures so the answer is 5
There are 5 significant figures in 13,000. cm(centimeters).
What is significant figures?Significant figures are often the sequence of data that add to the correctness of a value, frequently a measurement.
What is cm(centi-meter)?The length of an entity is usually measured in centimeters, which are metric units of measurement.
There are 5 significant figures in 13,000. cm(centimeters).
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How many double bonds in the molecule ch3chchc(0)ch3 ?
Answer:
2.
Explanation:
Kindly, find the attached image:there are 2 double bonds in this molecule:
one between CH and CH.The other between Ca and O in the carbonyl group.Which of these elements is a metal?
Answer:
The options are missing, so I will answer the question in a general manner.
This group of elements includes the alkali metals, alkaline earth metals, transition metals, basic metals, lanthanides and actinides. Depending on conditions, elements belonging to the metalloid group may behave like metals. So, if you want to know if an element is a metal, just found it in the periodic table.
When bonding with nonmetals in ionic compounds, they are converted into cations. When bonding together they make metallic compounds. When multiple metals bound they form alloys (these can include nonmetals too).
A 5.000 g sample of Niso4 H2O decomposed to give 2.755 g of anhydrous NiSO4.
What is the formula of the hydrate?
What is the full chemical name for the hydrate?
What is the molar mass of the hydrate? NiSO4•_H2O
What is the mass % of water in the hydrate?
Answer:
a) 7.0.
b) Nickel sulfate hepta hydrate.
c) 280.83 g/mol.
d) 44.9%.
Explanation:
a) What is the formula of the hydrate?
The mass of the hydrated sample (NiSO₄.xH₂O) = 5.0 g,
The mass of the anhydrous salt (NiSO₄) = 2.755 g,
The mass of water = 5.0 g - 2.755 g = 2.245 g.
∴ no. of moles of water = mass/molar mass = (2.245 g)/(18.0 g/mol) = 0.1247 mol.
∴ no. of moles of anhydrous salt (NiSO₄) = mass/molar mass = (2.755 g)/(154.75 g/mol) = 0.0178 mol.
∴ water of crystallization in the sample (x) = no. of moles of water/no. of moles of anhydrous salt (NiSO₄) = (0.1247 mol)/(0.0178 mol) = 7.0.
b) What is the full chemical name for the hydrate?
The name of the salt (NiSO₄.7H₂O) is Nickel sulfate hepta hydrate.
c) What is the molar mass of the hydrate?
(NiSO₄.7H₂O)
The molar mass = molar mass of NiSO₄ + 7(molar mass of H₂O) = (154.75 g/mol) + 7(18.0 g/mol) = 280.83 g/mol.
d) What is the mass % of water in the hydrate?
The mass % of water = (mass of water)/(mass of hydrated sample) x 100 = (2.245 g)/(5.0 g) x 100 = 44.9%.
Which state of matter is highly compressible, is made of particles moving independently of each other, and is present in large quantities near Earth’s surface?
Answer:
GAS
Explanation:
Answer:
Gas
Explanation:
The gaseous state of matter is highly compressible. According to the kinetic theory of matter, in the gaseous state, gas molecules largely move independent of each other and experience very little intermolecular forces between them.
Gases are abundant in the atmosphere near the earth's surface.
Which letter represents the activated complex?
1. A
2. B
3. F
4. G
Answer:
2. B.
Explanation:
The letter B represents the activated complex.The activated complex is the intermediate that is formed between the states of reactants "F" and products "G".Letter A represents the activation energy of the reaction, that is the difference in potential energy between the reactants "F" and activated complex "B".Letter C represents the enthalpy change of the reaction, that is the difference in potential energy between products "G" and reactants "F".Letter D represents the potential energy of products "G".Letter E represents the potential energy of reactants "E".Answer:
2. B on EDG 2020
Explanation:
Got it Right :)
Which best describes nuclear fission?
O A nucleus spontaneously splits and absorbs energy,
O Two nuclei spontaneously combine and absorb energy,
O A nucleus collides with a neutron and splits, releasing energy.
Nuclei combine to form a heavier nucleus, releasing energy
Nuclear fission is a nuclear reaction where a nucleus absorbs a neutron and splits into two smaller nuclei, releasing energy and more neutrons, which can cause a chain reaction. It's used in nuclear reactors and nuclear weapons.
Nuclear fission is the process in which a nucleus absorbs a neutron and splits into two lighter nuclei, known as fission fragments, releasing a significant amount of energy. This reaction is exothermic, meaning it releases energy in the form of heat, gamma rays, and the kinetic energy of additional neutrons.
These free neutrons may go on to induce fission in other nuclei, creating a chain reaction. A critical aspect of fission is that a minimum amount of fissile material, known as the critical mass, is necessary for a sustained chain reaction to occur. Therefore, the correct option that describes this process is 'A nucleus collides with a neutron and splits, releasing energy.'
The enormous energy release from fission makes it the foundational principle behind nuclear reactors and nuclear weapons. The fission of heavy elements like uranium or plutonium is harnessed as a heat source in nuclear power plants to produce electricity or to drive explosive reactions in atomic bombs.
Answer:
D : Nuclei combine to form a heavier nucleus, releasing energy.
Explanation:
Nuclear fusion is a process by which two or more atomic nuclei combine to form one or more different atomic nuclei and subatomic particles. The nuclei usually involved are deuterium and tritium, which are hydrogen variants. The difference in mass between the reactants and products is manifested as either the release or absorption of energy. Fusion reactions take place in a state of matter called plasma, which is a hot, charged gas made of positive ions and free-moving electrons. Fusion reactions release massive amounts of energy, and this is the same process that powers the sun
What must be true about two objects if heat is flowing between them?
Answer:
The temperatures of the objects must be different
Explanation:
if heat is flowing between two objects, then the objects must be at different temperatures.
Answer:
The have to different temperature
Explanation:
A new pesticide has been introduced to the habitat of this population of beetles.
Which describes the effect of this environmental change?
decreased genetic variation
increased genetic variation
genetic drift
gene flow
Answer:
The correct answer is "decreased genetic variation".
Explanation:
By introducing a new pesticide into the habitat of a beetle population what happens is that there will be a decrease in the genetic variation in this population. This is due to the harmful effect that pesticides have on insects and other living beings.
Have a nice day!
A new pesticide has been introduced to the habitat of this population of beetles. The effect of this environmental change is decreased genetic variation and the correct option is option 1.
What are Pesticides?Pesticides are chemical substances that are meant to kill pests. In general, a pesticide is a chemical or a biological agent such as a virus, bacterium, antimicrobial, or disinfectant that deters, incapacitates, kills, pests.
By their nature, pesticides are potentially toxic to other organisms, including humans, and need to be used safely and disposed of properly. They are among the leading causes of death by self-poisoning, and this burden is felt disproportionately in low- and middle-income countries.
Therefore, A new pesticide has been introduced to the habitat of this population of beetles. The effect of this environmental change is decreased genetic variation and the correct option is option 1.
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APPLYING SKILLS #1 & #2: Calculating the percentage yield
5.75g of sodium is reacted with chlorine to produce sodium chloride.
If the actual yield is 10.2g, calculate the percentage yield. Leave your
answer to 3 significant figures (4 marks)
2Na + Cl2 → 2Naci
Answer:
69.8 %.
Explanation:
2Na + Cl2 = 2NaCl
Using Relative Atomic Masses:
2*22.99 g sodium should produce 2*(22.99 + 35.45) = 116.88 g of sodium chloride
So 5.75 g Na should give 116.88 * 5.75 / 2*22.99 g = 14.62 g NaCl
% yield = 10.2 / 14.62 = 69.8%.
2Na + Cl2 = 2NaCl
Using Relative Atomic Masses:
2×22.99 g sodium should produce 2×(22.99 + 35.45) = 116.88 g of sodium chloride
So 5.75 g Na should give 116.88 ×5.75 / 2×22.99 g = 14.62 g NaCl
percentage yield = 10.2 / 14.62 = 69.8%.
Sodium chloride is the chemical name for salt. Sodium is an electrolyte that regulates the amount of water in your body. Sodium also plays a part in nerve impulses and muscle contractions.
What is sodium chloride used for?Sodium chloride is an essential nutrient and is used in healthcare to help prevent patients from becoming dehydrated. It is used as a food preservative and as a seasoning to enhance flavor.
Sodium chloride is also used in manufacturing to make plastics and other products. It is also used to de-ice roads and sidewalks.
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identify the branch of chemistry.
percentage purity of glucose.
Answer:
1. There are many branches of chemistry or chemistry disciplines. The five main branches are organic chemistry, inorganic chemistry, analytical chemistry, physical chemistry, and biochemistry.
2. 25mg
The question regarding the percentage purity of glucose falls under the domain of analytical chemistry, a branch of chemistry focused on analyzing substances to ascertain their composition and purity. It involves calculating the ratio of the pure substance's mass to the sample's total mass and converting this into a percentage.
Explanation:The question about identifying the percentage purity of glucose pertains to the branch of chemistry known as analytical chemistry. This field is crucial for quantitatively and qualitatively analyzing substances to determine their composition and purity. To find the percentage purity of a sample, one would typically use the formula:
%purity = (mass of compound / mass of sample) × 100
For instance, if you're analyzing glucose, you'll first need to determine the total mass of the glucose sample you're evaluating. After that, you conduct an experiment or analysis to ascertain the mass of pure glucose within that sample. Once you have both values, you substitute them into the equation to calculate the percent purity of the glucose. This allows chemists to ensure that the concentration of glucose or any other substance is within the required specifications for its intended use, whether that be for consumption, industrial applications, or research.
Such analysis is vital for ensuring the safety and effectiveness of products, maintaining quality control, and complying with legal standards for purity and composition.
Solution F has a pH of 11, and Solution G has a pH of 13.
How does the concentration of hydroxide ions in Solution F differ from Solution G?
Solution G has three times as many hydroxide ions as Solution F.
Solution G has 100 times more hydroxide ions than Solution F.
Solution F has 100 times more hydroxide ions than Solution G.
Solution F has three times as many hydroxide ions as Solution G.
Answer:
Solution G has 100 times more hydroxide ions than Solution F.
Explanation:
∵ pH + pOH = 14.
∴ pOH = 14 - pH.
For solution F:
pOH = 14 - pH = 14 - 11 = 3.
∵ pOH = -log[OH⁻] = 3.
∴ [OH⁻] = 0.001 M.
For solution G:
pOH = 14 - pH = 14 - 13 = 1.
∵ pOH = -log[OH⁻] = 1.
∴ [OH⁻] = 0.1 M.
∴ [OH⁻] of solution G / [OH⁻] of solution F = (0.1)/(0.001) = 100.
So, Solution G has 100 times more hydroxide ions than Solution F.
You completed three terra-forming trials. Describe how the suns mass affects planets in a solar system. Use the data your recorded to support your conclusions
Answer:
The suns mass affects the planets in the solar system because the grater the mas the stronger the gravitaional pull so the saster the planet orbits the sun.
Explanation:
Suns mass directly affected the position of planets in the solar system.
What is the effect of mass of sun?If the mass of the Sun is increased, the Sun would exert a stronger gravitational force on materials present around it. This change in mass of sun would disturb the orbits of all of the planets, pulling them closer to it.
So we can conclude that suns mass directly affected the position of planets in the solar system.
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How does the paint on a car help to keep it from rusting?
•The paint acts as a catalyst.
•Paint decreases the temperature of the metal.
•Paint increases the surface area of the metal.
•Paint protects the metal from exposure to oxygen.
Answer:
option c
Explanation:
rusting is the formation of ferrousoxide on the orin this can be prevented by applying some paint on the surface
Answer:
Option-(C): Paint increases the surface area of the metal.Different machines and more over vehicles are painted for the reason of protecting it from any possible rusting. As there a number of rusting agents which are present all over the place, and they increase the chances of rust formation on the surface of the metal body.Just because the rust is the collection of unwanted and harmful agents (present on the unprotected or unpainted)surface of the machine) which tends to break the basic links or bonds between the different atoms or molecules, which results in a more deformed form of structure for the vehicle. The paint are there to have a defense line like mechanism for each of the vehicle, as it enhances the cars layers capacity to widen up and there is a lot of space for the actual body of the car to remain protected under the paint's layer.
A team of engineers has decided to design a new shoe for people suffering from a painful foot condition. Each of the following tasks is necessary for the engineers to undertake during the beginning phase of the project except which?
A. Have subjects wear the shoes in an experimental trial to see if symptoms improve
B. Do research on orthopedic shoes that have already been designed for this condition
C. Estimate the price potential consumers would be willing to pay for this product
D. Look into the available materials and weigh the advantages and disadvantages of each
Answer:
A. have subjects wear the shoes in an experimental trial to see if symptoms improve.
Answer: Option A
Explanation:
When the team of engineers decided to design a footwear that will help the people suffering from painful foot condition that is caused by footwear.
There are many steps in designing such a footwear that is helpful in treating this problem. First of all they will look the other footwear available in the market and the problem that is not being solved by the available option.
They will do research and study a bit of orthopedics to get more knowledge about the bones and shoes.
They will also estimate the cost of shoes. But they will not wait to see if the symptoms improve because it is the feedback step of the experiment.
what does the field of thermodynamics relate to
A-changes in nuclear reactions
B- changes in energy in systems
C changes in molecular structure
D changes in atomic properties
Answer:
B. Changes in energy in systems.
Explanation:
Thermodynamics is a branch of physics which deals with heat and temperature in relation to energy work radiation and characteristics of matter.
This field studies the causes of energy changes and the effects of energy changes to chemical and physical systems.
Thermodynamics relates B) changes in energy in systems.
Explanation:Thermodynamics is the part of material science that manages warmth and temperature, and their connection to energy, work, radiation, and properties of issue. The conduct of these amounts is administered by the four laws of thermodynamics which pass on a quantitative depiction utilizing quantifiable naturally visible physical amounts, yet might be clarified as far as tiny constituents by factual mechanics.
Thermodynamics applies to a wide assortment of subjects in science and building, particularly physical science, concoction designing and mechanical designing, yet in addition in fields as intricate as meteorology.