Q4. (assessment criteria 3. 1) state newton's law of cooling and define the terms in the equation. 1. 2. Obtain the solution when the initial liquid temperature is 100 c, the ambient temperature is 2 and the thermal time constant is 60 min. 3. Plot the solution. Remember to label the axis. 4. Calculate the fluid temperature after one time constant.

Answers

Answer 1
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Related Questions

3. Of the following answers, which is NOT a way for employees to control exposure routes?

Answers

There are a lot of ways employees uses in controlling exposure routes.  But when risk assessment is not be performed is not a part of the control methods.

What are the three ways to  control workplace hazards?

The ways to control workplace hazards are known to be means taken to ensure safety in the workplace.

The examples are:

The use a hazard control plan to know, select and implement controls. Looking into the efficiency of existing controls, and creating plans with measures to protect workers in case of emergencies and nonroutine activities, etc.

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A rope is wrapped three and a half times around a cylinder. Determine the range of force T exerted on
the free end of the rope for maintaining equilibrium that is required to just support a 5 kN weight. The
coefficient of friction between the rope and the cylinder is 0.2

Answers

The range of force exerted at the end of the rope is; 285.7 N to 1,000 N.

What is the Net horizontal force?

The net horizontal force of the cylinder when it is at equilibrium position can be found by applying Newton's second law of motion. Thus;

∑F = 0

F - μF_n = 0

We are given;

F_n = 5 kN = 5000 N

μ = 0.2

Thus;

F - 0.2(5,000) = 0

F - 1,000 = 0

F = 1,000 N

The strength of the applied force will be increasing as the number of turns of the rope increases. Thus;

Minimum force = Total force/number of turns of rope

Since rope is wrapped three and half times, then;

number of turns = 3.5

Thus;

minimum force = 1,000/3.5

minimum force = 285.7 N

Thus, the range of force exerted at the end of the rope is 285.7 N to 1,000 N.

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Consider an area-source box model for air pollution above a peninsula of land. The length of the box is 15 km, its width is 80 km, and a radiation inversion restricts mixing to 15 m. Wind is blowing clean air into the long dimension of the box at 0.5 m/s. On average, there are 250,000 vehicles on the road, each being driven 40 km in 2 hours and each emitting 4 g/km of CO.

Required:
a. Estimate the steady-state concentration of CO in the air. Should the city be designated as "nonattainment" (i.e., steady-state concentration is over the NAAQS standard)?
b. Find the average rate of CO emissions during this two-hour period.
c. If the windspeed is zero, use the formula to derive relationship between CO and time and use it to find the CO over the peninsula at 6pm

Answers

Consider an area-source box model for air pollution above a peninsula of land. The length of the box is 15 km, its width is 80 km, and a radiation inversion restricts mixing to 15 m. Wind is blowing clean air into the long dimension of the box at 0.5 m/s. On average, there are 250,000 vehicles on the road, each being driven 40 km in 2 hours and each emitting 4 g/km of CO.

Required:

a. Estimate the steady-state concentration of CO in the air. Should the city be designated as "nonattainment" (i.e., steady-state concentration is over the NAAQS standard)?

b. Find the average rate of CO emissions during this two-hour period.

c. If the windspeed is zero, use the formula to derive relationship between CO and time and use it to find the CO over the peninsula at 6pmConsider an area-source box model for air pollution above a peninsula of land. The length of the box is 15 km, its width is 80 km, and a radiation inversion restricts mixing to 15 m. Wind is blowing clean air into the long dimension of the box at 0.5 m/s. On average, there are 250,000 vehicles on the road, each being driven 40 km in 2 hours and each emitting 4 g/km of CO.

Required:

a. Estimate the steady-state concentration of CO in the air. Should the city be designated as "nonattainment" (i.e., steady-state concentration is over the NAAQS standard)?

b. Find the average rate of CO emissions during this two-hour period.

c. If the windspeed is zero, use the formula to derive relationship between CO and time and use it to find the CO over the peninsula at 6pmConsider an area-source box model for air pollution above a peninsula of land. The length of the box is 15 km, its width is 80 km, and a radiation inversion restricts mixing to 15 m. Wind is blowing clean air into the long dimension of the box at 0.5 m/s. On average, there are 250,000 vehicles on the road, each being driven 40 km in 2 hours and each emitting 4 g/km of CO.

Required:

a. Estimate the steady-state concentration of CO in the air. Should the city be designated as "nonattainment" (i.e., steady-state concentration is over the NAAQS standard)?

b. Find the average rate of CO emissions during this two-hour period.

c. If the windspeed is zero, use the formula to derive relationship between CO and time and use it to find the CO over the peninsula at 6pm

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Calculate the current in the coiled heating element of a 240-V stove. The resistance of the element is 60 ohms at its operating temperature.

Answers

Answer:

  4 A

Explanation:

Current is found using Ohm's law.

  I = V/R

  I = (240 volts)/(60 ohms) = 4 A

The heating element current is 4 amperes.

3. What type of thinking are you
engaging in when you ask about the
pay and benefits of a job you are
considering?
a) constructive
b) associative
c) critical
d) creative

Answers

Contextual because you are constructing thoughts about a job.

The type of thinking are you engaging in when you ask about the pay and benefits of a job you are considering is known as constructive. Thus, the correct option for this question is A.

What are the different types of thinking?

The different types of thinking may include convergent or analytical thinking, divergent thinking, critical thinking, and creative thinking. Each of these types has specific attributes and a set of functions in order to make a specific criterion for individuals.

Constructive Thinking refers to a set of cognitive productive and counterproductive automatic habitual thoughts that affects one's ability to think in a manner that solves problems. It basically includes the ability to solve problems in everyday life with minimal stress.

Therefore, constructive thinking is the type of thinking that are you engaging in when you ask about the pay and benefits of a job you are considering. Thus, the correct option for this question is A.

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what is this answer Is cereal soup?

Answers

Cereal soup is like spaghetti Os is it soup is it cereal who knows

Answer:

depend what cereal yeha

Explanation:

no explanation

What is the most common impediment to communication in cross functional team

Answers

Answer:

Conflicting goals. Specialised jargon. Unequal responsibilities

The gas velocity decrease from 480 m/s to 160 m/s through a stationary normal shock. If the pressure and density upstream of the shock are 62 kPa and 1.5 kg/m^3 , respectively, find the pressure and density down stream of the shock and the specific heat ratio of the gas.

Answers

Answer:

52m/s

12 kpa

0.1 kg/m

Explanation:

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7)
Given a series silicon diode circuit with the resistor R=2 ko ohms and an applied voltage of 10
V, what is Ipg?
A) 0.5 mA
B) 10 mA
C) 4.65 mA
D) 1.0 mA

Answers

Answer:

  C)  4.65 mA

Explanation:

The series circuit will have a voltage drop of about 0.7 V across the silicon diode, so the voltage drop across the 2 kΩ resistor is 10 -0.7 = 9.3 V. The current through the resistor is given by Ohm's Law:

  I = V/R = 9.3 V/(2 kΩ)

  I = 4.65 mA

A liquid of specific heat 3000J/kgk rise from 15°c to 65°c in 1 min when an electric heater is used. If the heater generate 63000J, calculate the mass of the water​

Answers

Answer:

  0.42 kg

Explanation:

Heat is proportional to mass by way of the conversion factor that is the inverse of the specific heat.

  [tex]\dfrac{63000\text{ J}}{\dfrac{3000\text{ J}}{\text{kg$\cdot$K}}\cdot(65-15)\text{ K}}=0.42\text{ kg}[/tex]

The mass of the liquid is about 0.42 kg.

Explain how to properly engage the safety latches on the Stan Design Pit Jack.

Answers

The way to properly engage the safety latches on the Stan Design Pit Jack is:

Connect the hydraulic jack.Make sure it is properly lubricated.Ensure that the rolling bridge jack is well fused together.Use the machine.

What is the Stan Design Pit Jack?

This refers to the machination which makes use of pit jacks to execute tire rotation in a fast lube pit.

We can note that based on the design, this machine is put in the pit of a car and then rolls back and forth and perform their operations on both the front and real axles.

Hence, it is important to note that the safety latches are designed to prevent work accidents and it is important to properly lubricate the parts to prevent damage.

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What is the dumbest way you’ve been injured?

Answers

Someone threw a penny at me and it went in my mouth, and then I started choking and I had to go to the hospital :)))

Answer:

Once when I was playing a soccer game I tripped over the ball then a heavy girl accidentally ran over my hand and that's how I fractioned my finger  

Explanation: i-

From the top of a vertical cliff 80m high, the angles of depression of 2 buoys lying due west of the cliff are 23° and 15° respectively. How far are the buoys apart?​

Answers

Answer:

  110 m

Explanation:

The geometry of the problem can be modeled by a right triangle. The height of the cliff forms one leg, and the distance to a buoy forms the other leg. The angle of depression is opposite the height of the cliff. An appropriate trig relation is ...

  Tan = Opposite/Adjacent

Solving for the Adjacent side (the distance to the buoy), we find ...

  Adjacent = Opposite/Tan

  distance to buoy 1 = (80 m)/tan(23°) ≈ 188.468 m

  distance to buoy 2 = (80 m)/tan(15°) ≈ 298.564 m

Then the distance between the buoys is ...

  298.564 -188.468 m ≈ 110 m

The buoys are about 110 meters apart.

Technician A says that a circuit with continuity reads 0 ohms. Technician B says that an open circuit reads 0 ohms. Who is correct

Answers

Answer:

  A

Explanation:

An open circuit has infinite resistance, not 0. A circuit with continuity usually measures a few ohms or less, depending on the length and gauge of the wire and the condition of the connections. Often, on a general-purpose ohmmeter, the reading is very near 0 ohms.

Technician A is correct.

Which option identifies why the design in the following scenario represents a green engineering design solution?

Emily has just redesigned a toy car. The materials she used were once parts of automobiles that were taken to recycling plants.


✔️She is incorporating existing materials.
✔️She is discovering new materials.
✔️She is reducing waste through choice of materials.
✔️She is developing new materials.

Answers

The option that identifies why the design in the following scenario represents a green engineering design solution is option C: She is reducing waste through choice of materials.

What does it mean to reduce waste?

Anything that lowers waste by starting with less material is considered a waste reduction. Using both sides of a piece of paper, purchasing items in bulk rather than individually packaged, or using ceramic mugs instead of disposable ones are all easy ways to reduce waste.

Therefore, the way that Emily is using tends to lowers greenhouse gas emissions, conserves energy, and generates employment. You may contribute to pollution prevention and environmental protection by lowering the quantity of waste you produce. You also save money, protect natural resources, and reduce the quantity of waste that ends up in landfills.

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Answer:

She is Incorporating existing materials

Explanation:

Problem 2 (20 points): Three prismatic bars, two of material A and one of material B, transmit a tensile load P. The two outer bars (material A) are identical. The cross-sectional area of the middle bar (material I} B) is 50% larger than the cross-sectional area of the outer bar. Also, the modulus of elasticity of material A is twice that ofmaterial B. Find: (a) What fraction ofthe load Pis transmitted by the middle bar? (b) What is the ratio of the stress in the middle bar to the stress in the outer bars? (c) What is the ratio of the strain in the middle bar to the strain in the outer bars

Answers

Answer:

you said 20 points

Explanation:

Most schools use a learning management system (LMS) in order to make daily tasks easier, like taking attendance, entering grades, and: communicating with students and parents. Changing data into a different form, in order to prevent unauthorized access. Ensuring that regulations and standards are being met. Sorting through large amounts of data.

Answers

Answer:

like taking attendance, entering grades, and: communicating with students and parents.

Explanation:

Indeed, the learning management system (LMS) is a multipurpose software application that allows an organization to record, analyze, and distribute information at flexibility.  For example, a school can use this software to take attendance, enter student grades, and can facilitate communication with students and parents.

Consider a convergent duct with an inlet area A1 = 5 m2. Air enters this duct with a velocity V1=10m/s and leaves the duct exit with a velocity V2=30 m/s.

Required:
a. What is the area of the duct exit?
b. If the air pressure and temperature at the inlet area are 1.2 x105 N/m2, and 300K, respectively, what is the pressure at the exit?

Answers

Answer:

(a) The area of the duct exit is 1.67 m²

(b) The air pressure at the exit is 1.195 x 10 N/m²

Explanation:

Given;

inlet area, A₁ = 5 m²

inlet velocity, V₁ = 10 m/s

exit velocity, V₂ = 30 m/s

(a) The area of the duct exit is determined by applying continuity equation;

A₁V₁ = A₂V₂

Where;

A₂ is the area of the duct exit

A₂ = (A₁V₁) / (V₂)

A₂ = (5 x 10) / (30)

A₂ = 1.67 m²

(b) Apply Bernoulli’s equation to determine the pressure at the exit;

[tex]P_1 + \frac{\rho V_1^2}{2} = P_2 + \frac{\rho V_2^2}{2}\\\\P_2 = P_1 + \frac{\rho V_1^2}{2} - \frac{\rho V_2^2}{2}\\\\P_2 = P_1 + \frac{\rho }{2} (V_1^2 - V_2^2)[/tex]

Density of air at 300k = 1.177 kg/m³

[tex]P_2 = P_1 + \frac{\rho }{2} (V_1^2 - V_2^2)\\\\P_2 = 1.2*10^5 \ + \ \frac{1.177}{2} (10^2 - 30^2)\\\\P_2 = 1.2*10^5 \ + \ -470.8\\\\P_2 = 1.195*10^5 \ N/m^2[/tex]

Therefore, the air pressure at the exit is 1.195 x 10 N/m²

A completely reversible heat engine operates with a source at 1500 R and a sink at 560 R. At what rate must heat be supplied to this engine, in Btu/h, for it to produce 5 hp of power?

Answers

Answer: iy had around 5000 R

Explanation:

The Stefan-Boltzmann law can be employed to estimate the rate of radiation of energy H from a surface, as in

H = Aeσ^4

where H is in watts, A = the surface area (m^2 ), e = the emissivity that characterizes the emitting properties of the surface (dimensionless), σ = a universal constant called the Stefan-Boltzmann constant (= 5.67 x 10^8 W m^2 K^-4 ), and T = absolute temperature (K).

Required:
Determine the error of H for a steel plate with A = 0.15 m^2 , e = 0.90, and T 5 650 ± 20.
b. Compare your results with the exact error. Repeat the computation but with T = 650 ± 40. Interpret your results.

Answers

Explanation:

A.

H = Aeσ^4

Using the stefan Boltzmann law

When we differentiate

dH/dT = 4AeσT³

dH/dT = 4(0.15)(0.9)(5.67)(10^-8)(650)³

= 8.4085

Exact error = 8.4085x20

= 168.17

H(650) = 0.15(0.9)(5.67)(10^-8)(650)⁴

= 1366.376watts

B.

Verifying values

H(T+ΔT) = 0.15(0.9)(5.67)(10)^-8(670)⁴

= 1542.468

H(T+ΔT) = 0.15(0.9)(5.67)(10^-8)(630)⁴

= 1205.8104

Error = 1542.468-1205.8104/2

= 168.329

ΔT = 40

H(T+ΔT) = 0.15(0.9)(5.67)(10)^-8(690)⁴

= 1735.05

H(T-ΔT) = 0.15(0.9)(5.67)(10^-8)(610)⁴

= 1735.05-1059.83/2

= 675.22/2

= 337.61

Research new and upcoming “Green Designs” for any plumbing or electrical system in either in the residential or commercial arena. Describe what the idea is and what it does that makes it considered to be a green design and discuss how it is installed and interconnected with the rest of the mechanical and electrical systems within a project. Your paper should be in accordance with APA format. Using one inch margins, the body of the paper is to be between three and four pages. Your paper must also include a title page and reference page(s). An abstract is not required for this assignment. Your paper must include at least two references outside of your text book.

Answers

The use of solar power, hydropower system and geothermal systems are an upcoming trend in  plumbing or electrical system.

What is green design?

Green design is known to be a kind of product or system that is said to be reserved for those areas of design that are said to be consciously working to make the end product a sustainable and ecologically feasible one

Note that Green design is made in numerous fields such as, in car and plumbing or electrical system to save time and money.

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Question 1 A design team completes their high-fidelity prototype of a responsive website. Before they hand off designs to the engineering team, they need to confirm that the designs are final. What questions should they answer before handing off the designs

Answers

A question the design team should answer before handing off the designs is: are the designs a true representation of the intended end user experience?

What is a website?

A website can be defined as a collective name that is used to describe series of webpages that are interconnected or linked together with the same domain name.

In Computer technology, the main goal of a high-fidelity prototype is to understand how end users would interact with a website and areas to improve the design.

In conclusion, the design team should answer whether or not the designs are a true representation of the intended end user experience before handing off the designs.

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(TCO 6) A cable company is running a fiber-optic link between the head end and a neighborhood five miles away. The signal applied to the fiber goes through an optical connector having 3dB LOSS at the head end, the fiber has a LOSS of 1 dB, and the connector at the end of the fiber has a LOSS of 3 dB before being applied to an amplifier used to make up for the losses. The desired signal at the output of the amplifier is 10 dBm, and the signal level applied to the fiber connector at the head end is 10 dBm. What should the gain of the amplifier be to have 10 dBm at the output of the neighborhood amplifier

Answers

Answer:

7 dB

Explanation:

The total loss from the headend to the amplifier input is the sum of the losses along the fiber, that we simply add as they are in dBs:Total Loss = 3 dB + 1 dB + 3 dB = 7 dBThe signal at the amplifier input is just +10 dBm- 7 dB = +3 dBmSo as the output level at the Headend and the one at the output of the neighborhood amplifier must be equal each other (compensating all losses in the path), the amplifier gain must be equal to the cumulative loss, i.e. , 7 dB, so that the amplifier output level be + 10 dBm.

Please give me the answers

Answers

Answer:

Water ferries

Witch type of wetland has shollow water or streams.

Answers

Non-tidal marshes are the most prevalent and widely distributed wetlands in North America. They are mostly freshwater marshes, although some are brackish or alkaline. They frequently occur along streams in poorly drained depressions and in the shallow water along the boundaries of lakes, ponds and rivers.

This car is parked. The engine is off and there is no music playing, What energy is currently in use?

Answers

Answer:

Potential energy

Explanation:

"Potential energy" is a type of energy an object has when it's at rest or in this case not moving. The car is parked, and the engine is off, that means there is no electrical, kinetic, thermal, or mechanical energy in play since the engine isn't running and the car isn't moving. The radio is off too so that means there is no sound energy or electric energy (again) in play either. You are just parked with the car completely shut off, but you do have the potential to move the car by turning on the engine and start driving, which means potential energy is currently in use.

Hope this helps.

What is rainfall intensity

Answers

Answer:

Rainfall intensity is defined as the ratio of the total amount of rain (rainfall depth) falling during a given period to the duration of the period It is expressed in depth units per unit time, usually as mm per hour (mm/h).

Answer:

the ratio of the total amount of rain (rainfall depth) falling during a given period to the duration of the period

explain wet and dry compression tests​

Answers

A wet compression test is similar to a dry compression test except it has the addition of oil placed in each cylinder. A wet compression test is done for two reasons: One or more cylinders has a reading of less than 100 psi on the dry compression test.

How long would a piece of wood need to be to make a diagonal brace for a rectangle that measures 4 inches by 3 inches? Use the Pythagorean theorem, a² + b² = c², to determine the answer. 5 inches 7 inches 12 inches 25 inches Select the correct answer.

Answers

Answer:

Length of a diagonal = 5 inches

Explanation:

Let [tex]a[/tex] and [tex]b[/tex] the sides of the rectangle and [tex]c[/tex] be the diagonal of the rectangle.

According to the Pythagorean theorem, sum of squares of base and perpendicular is equal to the square of hypotenuse.

As each angle of the rectangle is a right angle,

[tex]a^2+b^2=c^2[/tex]

Put [tex]a=4\,,\,b=3[/tex]

[tex]4^2+3^2=c^2\\16+9=c^2\\25=c^2\\\sqrt{25}=c\\ 5=c[/tex]

So,

Length of a diagonal = 5 inches

identifies potential new customers and preserves favorable business relationships with past customers

Answers

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Other Questions
Q13. Which string has the highest pitch? To calculate the unit price of an item, divide the total number of units by the total price.Please select the best answer from the choices provided Which description shows the best balance of physical, social, and mental/emotional health?A. April has low self-esteem and is working on making more friends.B. Barbara plays hockey, eats well, and has frequent conflicts with her teammates.C. Marta has a large circle of friends and eats primarily junk food and chocolate.D. Terrence exercises for 30 minutes a day, eats well, and enjoys new challenges. Rearrenge the letters to form new word (math related) and then in one word or a phrase define/describe it 1. LURE ______ 2. SMERT______ 3. IFEINT ______ 4. IAMNOD______ 5. RANGERA_______ 6. REPTANT_______ 7. TINIFINE________ 8.UNQUEENS_______ 9. SECTIONCUVE_______ 10. COACHINGLALOR_________ What score would you need to get on the fifth test to have an average of 90% or higher if your first four scores were 87%, 82%, 91%, and 95% Adjusting entries to record expenses incurred in the current period, that will be paid in a future period, is described as Melisande collected 14 bottles on Saturday and 9 bottles on Sunday for recycling. On Monday, she took all the bottles to the recycling center, where they paid her a certain amount, b, for each bottle. However, she had to pay the recycling center a one-time service fee of $0.25. If she left there with $3.20 for the bottles, what is the value of b? A company currently uses Brand A lightbulbs, which have a mean life of 1,000 hours. A salesperson marketing Brand B, a new brand of bulb, contacts the company. The company will switch to the new brand of bulb only if there is convincing evidence that the mean life of Brand B is greater than 1,000 hours. Which of the following hypotheses should the company test?A. H0: The mean life of Brand B is 1,000 hours. H1: The mean life of Brand B is more than 1,000 hoursB. H0: The mean life of Brand B is 1,000 hours. H1: The mean life of Brand B is less than 1,000 hoursC. H0: The mean life of Brand A is 1,000 hours. H1: The mean life of Brand A is more than 1,000 hoursD. H0: The mean life of Brand A is 1,000 hours. H1: The mean life of Brand A is less than 1,000 hoursE. H0: The mean life of Brand A is equal to the mean life of Brand B bulbs H1: The mean life of Brand A is not equal to the mean life of Brand B bulbs Select the correct locations on the graph.Select the lines that represent functions. Explain why unions play a reduced role in the US economy today. Write an equation in slope intercept form of the line that passes through the points (-5,4) and (5,0) A wave traveling at 280 m/s has a wavelength of 5.2 meters. The frequency of this wave is CHOOSE ANSWER. Sara is a geographer and an environmental scientist. She wants to study how forests are growing or shrinking as a result of human behavior. Sara is using photographs and images taken from Landsat, an object orbiting through the Earth's atmosphere, to understand the situation.Which remote sensing technology is Sara using in this situation If you are having trouble creating a balanced, geometric artwork, you could change your design to aasymmetrical balance basymmetrical imbalance csymmetrical balance dsymmetrical imbalance Write the equation, in standard form, of the line passing through (0,-8) with a slope of -1/2 List how powerful businessmen of the Industrial Age were bad?? A projectile moves horizontally with ____?____motionHELP PLEASE How do laws differ from folkways and mores The painting American Gothic is usually taken very seriously. This poem does not address this idea quite as seriously as many people do. What does that make this poem?ImitationParodySatireIrreverent The measure of angle bac can be calculated using the equation sine super negative 1 (startfraction 3. 1 over 4. 5 endfraction) equals x. Triangle a b c is shown. Angle a c b is a right angle. The length of hypotenuse a b is 4. 5 inches and the length of c b is 3. 1 inches. Angle c a b is x. What is the measure of angle bac? round to the nearest whole degree. 0 1 44 48