The variation of temperature in a plane wall is determined to be T(x)=52x+25 where x is in m and T is in ∘C. If the temperature atone surface is 38 ∘ C, the thickness of the wall is

(a) 0. 10 m

b) 0. 20 m

(c) 0. 25 m

(d) 0. 40 m

(e) 0. 50m

Answers

Answer 1

The constant deceleration of the car is  0.25 m. The correct answer is (c)0. 25 m

The thickness of the wall can be found by rearranging the equation T(x) = 52x + 25 to solve for x, and then plugging in the given temperature at one surface.

1. Rearrange the equation to solve for x:

T(x) = 52x + 25

T(x) - 25 = 52x

(T(x) - 25)/52 = x

2. Plug in the given temperature at one surface (38°C) for T(x):

(38 - 25)/52 = x

13/52 = x

3. Simplify the fraction to get the thickness of the wall:

x = 0.25 m

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Related Questions

which indoor pollutant is commonly used in building materials, carpet backing, furniture, foam insulation, plywood, and particle board?

Answers

Formaldehyde is a indoor pollutant is commonly used in building materials, carpet backing, furniture, foam insulation, plywood, and particle board.

Pesticides are made comprised of both the active ingredient and chemicals that are used to transport the active agent. These carrier agents are referred to as "inerts" in pesticides because they are not poisonous to the insect that is being targeted, yet some inerts have the potential to harm human health. These substances, referred to as mutagens, work by directly changing the DNA sequence of a cell. Due to their size or structural characteristics, many mutagens are able to pass through nuclear and cellular membranes and interact directly with DNA, usually causing damage. A mixture of tiny liquid and solid particles that are in the air we breathe is referred to as particle pollution.

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a flow meter attached to the main line in a hydraulic system measures the flow rate at 10 gpm. the line has an inside diameter of 2 in. what is the flow velocity in the meter?

Answers

The flow velocity in the meter is 0.7958 in/min

How to determine

The flow meter attached to the main line in a hydraulic system measures the flow rate at 10 gpm. The line has an inside diameter of 2 in.

The flow velocity in the meter can be calculated using the formula:

Velocity = (Flow rate) / (Cross-sectional area)

The cross-sectional area of the line can be calculated as:

Area = π × (diameter/2)²

Substituting the given values, we get:

Area = π × (2/2)²

Area = π × 1

Area = π

Therefore, the velocity in the meter is:

Velocity = (10 gpm) / (π in²)

Simplifying the units, we get:

Velocity = (10 gal/min) / (π × (2 in)²)

Velocity = (10 gal/min) / (π × 4 in²)

Velocity = (10/4π) in/min

Velocity ≈ 0.7958 in/min

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a material’s k-value is based on the assumption that the thickness of the material is ____.

Answers

A material's k-value is based on the assumption that the thickness of the material is uniform.

The k-value, also known as the thermal conductivity or thermal conductance, is a property that quantifies how well a material conducts heat. It represents the amount of heat that flows through a unit thickness of the material per unit time when there is a temperature difference across it. To calculate the k-value, it is assumed that the thickness of the material is uniform throughout. This assumption allows for simplified calculations and comparisons of thermal properties across different materials. Therefore, the answer is "Uniform".

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External crack of length of 3.0 mm was detected on the surface of the shaft of wind turbine made from 4340 steel. The diameter of the shaft of wind turbine is equal to 32 mm. Assume the shaft is subjected to a maximum load of 50,000 N during operation and the radius of the curvature of the crack is 3 x 10-2 mm. Determine the Fracture toughness KC of the shaft Express your answer in to four significant figures. Do not include the units.

Answers

Answer:

The correct answer is "\(K_c=6.0369 \ MPa\sqrt{m}\)".

Explanation:

Given:

Maximum load,

P = 50,000 N

Crack length,

a = 3mm

or,

  = 3×10⁻³ m

Diameter,

d = 32 mm

As we know,

⇒  Maximum stress, \(\sigma=\frac{P}{A}\)

                                      \(=\frac{50000}{(\frac{\pi}{4}\times 32^2)}\)

                                      \(=62.20 \ N/mm^2\)

Now,

⇒  Fracture tougness, \(K_c=Y \sigma\sqrt{\pi a}\)

On substituting the values, we get

                                           \(=1\times 62.20\times \sqrt{3.14\times 3\times 10^{-3}}\)

                                           \(=6.0369 \ MPa\sqrt{m}\)

Question 2 of 10 Eduardo bought a refrigerator with a sticker price of $2400. If he paid $35 a week for two years, what was the approximate markup rate on the refrigerator? O A. 51.7% OB. 75.8% O C. 65.9% D. 34.1%​

Answers

The approximate markup rate on the refrigerator is A. 51.7%

How to solve

In order to estimate the markup percentage applied to the refrigerator, it is necessary to ascertain the total sum paid by Eduardo during the two-year period.

Over a period of 2 years, he regularly contributed $35 every week, resulting in a total sum of $3640, calculated by multiplying $35/week by 52 weeks/year and then further by 2 years.

We can determine the markup percentage by computing the variance between the overall sum disbursed and the price labeled on the item: $3640 subtracted by $2400 equals $1240.

One way to calculate the percentage markup is by dividing the markup amount by the original price, then multiplying the result by 100. For instance, if the markup is $1240 and the original price is $2400, the percentage markup would be approximately 51.7%.

The fridge has been marked up by around 51.7%.

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If the hypotenuse of a right triangle is 12 and an acute angle is 37 degrees find leg a and leg b lengths

Answers

scrity añao devid codicie

The power supply of a 3phase induction motor is 40kw and the corresponding stator losses are 1.5kw. Calculate the total mechanical power developed below

Answers

Two different kinds of losses can happen in a three-phase induction motor. These losses are variable losses that are constant or fixed losses. Fixed or Constant Losses Consta.

Exactly how are stator losses determined?

Stator losses, including as stator iron loss and stator copper loss, are financed in part by this power input. Rotor input is provided with the leftover power, or (input electrical power - stator losses). Thus, rotor input P2 equals Pin minus stator losses (stator copper loss and stator iron loss).

What are the induction motor's three-phase losses?

Fixed losses, Copper losses, and stray losses are a few types of losses that can occur in three-phase induction motors. Core losses, bearing friction losses, brush friction losses (in wound rotor motors), and windage losses make up the majority of these losses.

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A commercial aircraft is in steady flight. The overall lift to drag coefficient is 25. The other flight data are: (i)Weight of aircraft (including crew and passengers) = 70,000 kg (ii) Flight speed 400 km/hr (iii) Average wing span = 50 m (iv) Average wing chord = 7 m When in operation 20% of fuel power is lost. Find the power required for this steady flight. (5M)

Answers

Explanation:

weight of aircraft including crew and passengers is equal to 70000 kg therefore option is a thecorrect answer

If a transformer is operated at rated frequency but voltage higher then the rated value, how do you expect the following quantities to change:-
A) No-load current.
B) Hysterics loss.
C) Eddy current loss.​

Answers

The answer would be AHope it help :)

Hey guys can anyone list chemical engineering advancement that has been discovered within the past 20 years

Answers

Top 10 Emerging Technologies in Chemistry
Nanopesticides. The world population keeps growing. ...
Enantio selective organocatalysis. ...
Solid-state batteries. ...
Flow Chemistry. ...
Porous material for Water Harvesting. ...
Directed evolution of selective enzymes. ...
From plastics to monomers. ...

What is a kind of useful car?

Answers

Yes what he/she said a truck is a very useful car if you want to go to work with it many use it for that, it can vary many things:)

the thevenin impedance of a network seen from the load terminals is 80 j55 ohms. for maximum power transfer, the load impedance must be:

Answers

The load impedance must be equal to the Thevenin impedance for maximum power transfer, so the load impedance must be 80 j55 ohms.

What is power?
Power is a measure of the ability to influence the environment, or to cause a change. It can be physical, financial, psychological, or a combination of all three. Power can be used for good or for bad, depending on the intentions of the person wielding it. Some examples of power include control over resources, authority and influence, access to information, and the ability to make decisions and take action. Power can also be seen as a form of privilege, as it often brings with it social, political, and economic advantages.

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A home with 8’ ceilings measure 42” x 30” the areas of the window and the door openings are approximately 125 ft.². What’s the total wall area that needs to be insulated

Answers

The total wall area that needs to be insulated is -29 ft².

The negative value indicates that the area of the window and door openings exceeds the total wall area, which seems unlikely. It's important to note that the given dimensions or calculations might contain errors or inconsistencies. Double-checking the measurements or obtaining accurate dimensions will be necessary to provide a valid answer.

To determine the total wall area that needs to be insulated, we first need to calculate the area of the window and door openings and subtract it from the total wall area.

The dimensions of the window and door openings are not provided, but we know that their combined area is approximately 125 ft². Let's assume that the window and door openings are rectangular in shape.

Let's calculate the area of the window and door openings:

Area = Length × Width

Given that the combined area is 125 ft², we can assume:

Area of window and door openings = 125 ft²

Now, let's calculate the total wall area that needs to be insulated:

Total wall area = Wall area - Area of window and door openings

To calculate the wall area, we need to find the perimeter of the home and multiply it by the height of the walls. Assuming the home is rectangular:

Perimeter = 2 × (Length + Width)

Total wall area = Perimeter × Height

Let's substitute the given dimensions into the equations:

Perimeter = 2 × (42" + 30") = 144 inches

Total wall area = (144 inches × 8 feet) / 12 = 96 ft²

Finally, we can calculate the total wall area that needs to be insulated:

Total wall area = 96 ft² - 125 ft² = -29 ft²

The negative value indicates that the area of the window and door openings exceeds the total wall area, which seems unlikely. It's important to note that the given dimensions or calculations might contain errors or inconsistencies. Double-checking the measurements or obtaining accurate dimensions will be necessary to provide a valid answer.

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If the input driver) gear is 30 teeth and the output (driven) gear is 15 teeth, what is the gear
ratio?

Answers

0.5 is the gear ratio of the gear having Input 30 teeth and output  15 teeth.

Gear Ratio is Defined as the ratio of the number of Output (driven) to input (Driver) .

Gear Ratio = output /input

The number of rotations of a  driven gear to the number of rotations of a driver gear Which means if the gear ratio is 3 the Driven will rotate 3 time if Driver rotates 1 time.

Gear ratio=15/30 = 0.5

Hence 0.5 is the gear ratio of the gear having Input 30 teeth and output  15 teeth. Higher gear ratio will give the better torque and acceleration.

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Poly(cis-1,4-isoprene), or natural rubber (NR), has a tendency crystallize. The Tm of this polymer is slightly below room temperature, although lightly-crosslinked NR can partially crystallize at room temperature when stretched. Apparently, Tm is elevated upon stretching which allows for crystallization above the Tm of the unstretched polymer. Explain.

Answers

Answer:

Explanation:

Crystalline melting temperature (Tm) is termed as the temperature required for a  crystalline polymer to change to a fluid or glasslike crystalline spaces of a semi-crystalline polymer liquefy (expanded sub-atomic movement).  

Crystallization of polymers is an interaction related with incomplete arrangement of their atomic and molecular chains. These chains crease together and structure requested districts called lamellae, which form bigger spheroidal designs named spherulites. Polymers can solidify after cooling from melting, mechanical extending, or dissolvable dissipation. Crystallization influences the optical, mechanical, and synthetic chemical properties of the polymer.  

For a crystalline polymer, a required polymer chain is present in or goes along a few crystalline and amorphous zones. The crystalline zones are comprised of intermolecular & intramolecular arrangements or deliberate and thus firmly stuffed plan of atoms or chain fragments, and an absence of it brings about the development of amorphous zones.  

The mechanical property boundary, for example, shear modulus expansions in the temperature of perception for polymer material framework.  

The temperature reaction of direct linear polymers might be seen as partitioned into three particularly separate fragments:  

1. Above Tm: The polymer stays as fluid whose consistency & viscosity would rely upon atomic molecular weight and temperature.  

2. Between Tm and Tg: This area may go between close to 100% crystalline & 100% amorphous chain atomic bunches relying upon the polymer underlying consistency. The amorphous part carries on similar to supercooled fluid in this section. The generally actual conduct of the polymer in this moderate portion is similar to an elastic rubber.  

3.Below Tg: The polymer material saw as glass is hard and inflexible, showing and emanating a predetermined coefficient of thermal extension. The glass is more like a crystalline strong than the fluid in personal conduct standard regarding mechanical property boundaries. In regard to the molecular atomic request, in any case, the glass all the more intently takes after the fluid. There is little contrast between the direct linear and cross-connected polymer beneath Tg.

A food processor purchases corn for use in its products. The firm uses 550 pounds of corn per week and purchases corn for $0.3 per pound from a supplier. The cost to hold one pound of corn in inventory for one year is $0.06. Each time the firm orders corn from the supplier, the firm must pay a $42 order processing charge.

Answers

If the purchasing cost, holding cost, and ordering cost are $1,980, $33, and $2,184. Then the total cost will be $ 4,197.

What is the total cost?

A total cost is the sum of all the costs which are paid by the company.

A food processor purchases corn for use in its products.

The firm uses 550 pounds of corn per week and purchases corn for $0.3 per pound from a supplier.

The cost to hold one pound of corn in inventory for one year is $0.06.

Each time the firm orders corn from the supplier, the firm must pay a $42 order processing charge.

The purchasing cost of the corn (PC) will be

PC = 550 x 0.3 x 12

PC = $ 1,980

The holding cost of the corn (HC) will be

HC = 550 x 0.06

HC = $ 33

The ordering cost of the corn (OC) will be

OC = 42 x 52

OC = 2,184

Then the total cost of the corn (TC) will be

TC = PC + HC + OC

TC = 1980 + 33 + 2184

TC = $ 4,197

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Give the following code, what would complete the missing code block to only print the elements of the array that are even numbers ? int[] [] array { {1,2,3,4},{5,6,7,8},{9,10,11,12}}; for (int out = 0; out < array.length; out++) { for (int in 0; in < array[0].length; in++) { ** missing code ** } } I. System.out.println( array(out++] [in] ); II. in++; System.out.println( array(out] [in]); III. System.out.println( array[out][in++] ); Ol only O ll only O ill only OI and II O I and III

Answers

The missing code block to only print the elements of the array that are even numbers would be option III: System.out.println(array[out][in++]).

In order to only print the elements of the array that are even numbers, we need to access each element of the array and check if it is divisible by 2 (i.e., an even number).

The given code already has two nested for loops to iterate over the rows and columns of the array. To complete the code block, we can use the System.out.println statement along with the array[out][in++] indexing to access each element and increment the column index (in) after printing the value.

By using option III: System.out.println(array[out][in++]), we ensure that the element is printed, and then the column index (in) is incremented for the next iteration.

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You installed a new 40 gallon water heater with a 54,000 BTUh burner. The underground water temperature coming into the house is 55F
How long will it take to heat the water in the tank to a normal setting of 120F.
Please show setup and explanation.

Answers

Answer:

For most uses you'll want your water heated to 120 F(49 C) In this example you'd need a demand water heater that produces a temperature rise and it will take about 2 hours

A company wants to develop audio speakers using an inexpensive type of plastic that has a very high quality of sound output. Which customers would most likely give a high evaluation of this product?

Answers

Answer:A

Explanation:

Those who want to save money and will use the product for only a few years

Answer:

THE ANSWER is A - those who want to save money and will use the product for only a few years

Explanation: Got it right on edg 2021

Save Answer Darbity when we went to assem. Name two principal da bodo with the use of the dynamically loadable kemol modules? (Select all that apply) There be placed ito RAM mage that is loaded alongside the internet mage the walkernel image when the system is initialized Makame memory and a basic kem with a number of modules loaded will consumo more memory than an equivalent kernel with the drivers compiled into the kemi The only of the emel boots Managing the modules does not work on the part of the administrator DARI OCIN DKY

Answers

The two principal advantages of using dynamically loadable kernel modules are: Efficient Memory Usage: Dynamically loadable kernel modules allow for the loading and unloading of specific modules as needed, which reduces memory consumption compared to having all drivers compiled into the kernel.

1. Efficient Memory Usage: When using dynamically loadable kernel modules, only the necessary modules are loaded into memory when they are needed. This results in lower memory consumption compared to having all drivers compiled into the kernel, as only the required modules are present in memory at any given time. This flexibility allows systems to optimize memory usage by loading modules on-demand and unloading them when they are no longer needed.

2. Flexibility and Manageability: Dynamically loadable kernel modules provide greater flexibility in managing system resources. Administrators can add or remove modules without rebooting the entire system, which allows for easier installation of new hardware or updating existing drivers. This dynamic nature of module management simplifies system maintenance and reduces downtime. Additionally, modules can be developed and tested independently, making it easier to maintain and update specific functionality without affecting the entire kernel.

Overall, the use of dynamically loadable kernel modules offers efficient memory usage and flexibility in managing system resources, making it a preferred approach for modular and adaptable kernel configurations.

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In poor weather you should___ your following distance

Answers

The answer is increase

What will be the future of cyber security?​

Answers

In 2031, cloud can only keep blazing forward. ... According to Hunt, cloud makes it faster, cheaper and easier than ever to put services online and collect huge amounts of data. “But, faster and easier and cheaper than ever means it's easier to leave it all exposed,” he said.

When choosing a respirator for your job, you must conduct a
test.

Answers

Answer: A fit test. Either qualitative or quantitative.
You could use a fit test.


I hope this helps.

PLZ HELP I GIVE BRAINLIEST!!

PLZ HELP I GIVE BRAINLIEST!!

Answers

Pretty sure it’s B not 100% sure though so...

Seth wants to build a wall of bricks. Which equipment will help him in the process?
OA masonry pump
OB. hacksaw
OC. mortar mixer
OD. pressurized cleaning equipment

Answers

C. mortar mixer

i took masonry for 2 years. hope this helps!

A suburban region in Panama City, FL, has been permitted to develop a shopping center. The
planned shopping center composition is described in Table 1. Assume that the overland flow distance
to the nearest stormwater drain that leads to a detention pond is 200 m.

Calculate the peak runoff rate (discharge in m3/s) from the shopping center during a 50-year storm.

answer to check your work: tc = 13 min

A suburban region in Panama City, FL, has been permitted to develop a shopping center. The planned shopping

Answers

The peak runoff rate from the shopping center during a 50-year storm is approximately 0.296 m/s.

How to calculate peak runoff rate

To calculate the peak runoff rate from the shopping center during a 50-year storm, use the Rational Method, which is given as

Q = (C * I * A) / 3600

where

Q is the peak runoff rate in m/s,

C is the runoff coefficient,

I is the rainfall intensity in mm/h, and

A is the total area of the shopping center in \(m^2.\)

Assuming a 50-year storm has a rainfall intensity of 152 mm/h based on the IDF curve example.

Using the runoff coefficients for the different surfaces in the shopping center, we can calculate the total area-weighted runoff coefficient as follows

C = [(0.95 * 71,000) + (0.85 * 17,000) + (0.65 * 22,000) + (0.90 * 5,000) + (0.70 * 25,000)] / (71,000 + 17,000 + 22,000 + 5,000 + 25,000)

C = 0.807

The total area of the shopping center is

A = 71,000 + 17,000 + 22,000 + 5,000 + 25,000 = 140,000 \(m^2\)

Now we can calculate the peak runoff rate

Q = (C * I * A) / 3600

Q = (0.807 * 152 * 140,000) / 3600

Q = 41.5 \(m^3/s\) or 41.5 / 140 = 0.296 m/s

Therefore, the peak runoff rate from the shopping center during a 50-year storm is approximately 0.296 m/s.

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A chemist mixed two substances together: a colorless liquid with a strong smell and a white solid with no smell. The substances' repeating groups of atoms are shown above on the left. After they were mixed, the chemist analyzed the results and found two substances. One ending substance had the repeating group of atoms shown above on the right. Is the ending substance the same substance as the colorless liquid? What happened to the atoms of the starting substances when the ending substances formed? Be sure to explain your answers to both of these questions.

Answers

Answer:

[a]. It is the same substance as the colorless liquid with a strong smell.

[b]. the substance with colorless liquid with a strong smell and a white solid with no smell are being used up to produce the ending substance had the repeating group of atoms shown above on the right and the other ending substance.

Explanation:

Atoms are referred to be the smallest units of a substance although it can be sub-divided into smaller units such as proton, neutron and electron. When atoms combines in group they form a molecule.

From the question above it is seen that two substances were mixed together to give two ending substances that is:

substance A [ colorless liquid with a strong smell] + substance B[white solid with no smell] ---------> substance C[ repeating group of atoms shown above on the right] + substance D.

The ending substance that is, substance C is the same substance as substance A which is the colorless liquid with a strong smell.

When the substance A reacted with substance B, it gives substance C and D that is the ending substances are the products of the reaction between A and B.

Hence, the substance with colorless liquid with a strong smell and a white solid with no smell are being used up to produce the ending substance had the repeating group of atoms shown above on the right and the other ending substance.

What is desktop publishing software

Answers

Desktop publishing (DTP) is the use of personal computers to design books and booklets that are intended to be printed by ink jet or laser printers. The software that supports desktop publishing has a WYSIWYG graphical user interface (GUI) to make the set-up for publishing as easy as possible.

if the center of gravity of an aircraft is moved from aft to beyond forward limit

Answers

The grain capacity is the entire amount of cargo space available for the transportation of bulk items. While being transported to its destination, cargo is protected in a ship's cargo hold.

You can adhere to the aircraft loading guidelines provided in the Pilot's Operating Handbook or UAS Flight Manual to ensure that the unmanned aircraft centre of gravity (cg) restrictions is not exceeded. A drone is an airplane without passengers or a human pilot; it is an unmanned aircraft. Although such an aircraft may be entirely autonomous, most often a human pilot controls it from a distance. You must now notify the Federal Aviation Administration of this deviation. This organization is in charge of upholding laws pertaining to the creation, use, and maintenance of aircraft. The organization controls air traffic and ensures that the navigation system is effective and safe.

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In I-Q modulation technique, many symbols or signals with different amplitude and phase are generated. What is the map of all of the symbols called:____.
a. signal diagram.
b. frequency spectrum.
c. 2-D graph.
d.constellation diagram.

Answers

Answer:

In I-Q modulation technique, many symbols or signals with different amplitude and phase are generated. What is the map of all of the symbols called:____.

d. constellation diagram.

Explanation:

A constellation diagram is a representation of all the possible symbols that a system can transmit.  It shows these as a collection of points on the map.  For a signal modulated by a digital modulation scheme, the constellation diagram is used to display both the ideal (reference) signal and the actual measured signal on the same plot.  Modulation simply means the process of converting data into electrical signals so that they are optimized for transmission.

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