A cylindrical having a frictionless piston contains 3.45 moles of nitrogen (N2) at 300 °C having an initial volume of 4 liters (L). Determine the work done by the nitrogen gas if it undergoes a reversible isothermal expansion process until the volume doubles. (20)
Answers
A cylindrical container having a frictionless piston contains 3.45 moles of nitrogen (N2) at 300 °C and an initial volume of 4 liters.
We need to determine the work done by the nitrogen gas if it undergoes a reversible isothermal expansion process until the volume doubles.
Here are the steps to solve the problem: First, we find the value of the initial pressure of nitrogen using the ideal gas equation,
PV = nRT. P = (nRT) / V = (3.45 × 8.31 × 573) / 4 = 16,702 Pa.
We use Kelvin temperature in the ideal gas equation. Here, R = 8.31 J/mol K is the ideal gas constant.
We know that the process is reversible and isothermal, which means the temperature remains constant at 300 °C throughout the process. Isothermal process implies that the heat absorbed by the gas equals the work done by the gas.
Therefore, we can use the equation for isothermal work done:
W = nRT ln (V2/V1)
Where W is the work done, n is the number of moles, R is the gas constant, T is the absolute temperature, V1 is the initial volume, and V2 is the final volume. Since we are doubling the volume,
V2 = 2V1 = 8 L. W = 3.45 × 8.31 × 573 × ln
(8/4)W = 3.45 × 8.31 × 573 × 0.6931W = 10,930 J or 10.93 kJ
The work done by the nitrogen gas during the isothermal expansion process is 10.93 kJ.
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Related Questions
Program that allows you to mix text and graphics to create publications of professional quality.
a) database
b) desktop publishing
c) presentation
d) productivity
Answers
The program that allows you to mix text and graphics to create publications of professional quality is desktop publishing.
Desktop publishing is a software application that enables users to combine text and graphics to produce high-quality publications such as brochures, flyers, newsletters, magazines, and more. It provides a comprehensive set of tools and features specifically designed for creating visually appealing and well-designed documents.
With desktop publishing software, users can easily import and manipulate text, images, illustrations, and other graphical elements to create professional-looking layouts. The program typically offers a wide range of formatting options, allowing users to adjust the font styles, sizes, and colors, as well as arrange and align objects with precision.
Additionally, it often includes advanced features like templates, master pages, and grids to assist users in maintaining consistency throughout their publications.
One of the key advantages of desktop publishing software is its ability to handle complex documents that involve a combination of text and graphics. Users can seamlessly integrate images, charts, tables, and diagrams into their publications, enhancing the visual appeal and conveying information effectively.
Moreover, the software offers tools for managing page layouts, adjusting margins, and controlling the overall design aesthetics, enabling users to achieve professional-quality results.
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Copper is an expensive metal ($2.69/lb) while aluminum is relatively inexpensive ($0.78/lb). However, the conductivity of copper higher than aluminum (6.0 x 107 (Ω-m)-1 compared to 3.8 x 107 (Ω-m)-1 ). What, if any, savings would there be by switching to aluminum wiring in a house, assuming the resistance of the wires remains constant? Useful conversion: 2.2 lb = 1 kg.
Answers
The cost savings from using cheaper aluminum wiring may outweigh the slightly higher resistance due to its lower conductivity.
To determine the potential savings by switching to aluminum wiring in a house, we need to consider the cost and conductivity of copper and aluminum.
The cost of copper is $2.69 per pound, while aluminum costs $0.78 per pound. We can convert these prices to cost per kilogram by dividing by 2.2 (2.2 lb = 1 kg):
Copper cost: $2.69/lb ÷ 2.2 lb/kg = $1.22/kg
Aluminum cost: $0.78/lb ÷ 2.2 lb/kg = $0.35/kg
Now, let's consider the conductivity of copper and aluminum. Copper has a conductivity of 6.0 x 10^7 (Ω-m)^-1, while aluminum has a conductivity of 3.8 x 10^7 (Ω-m)^-1.
Assuming the resistance of the wires remains constant, the savings from switching to aluminum can be calculated based on the relative conductivity. The higher the conductivity, the lower the resistance for a given length of wire.
Let's compare the relative conductivities:
Copper conductivity: 6.0 x 10^7 (Ω-m)^-1
Aluminum conductivity: 3.8 x 10^7 (Ω-m)^-1
The relative conductivity of aluminum compared to copper is (3.8 x 10^7) ÷ (6.0 x 10^7) = 0.633.
Therefore, aluminum has about 63.3% (or approximately two-thirds) of the conductivity of copper.
Considering the cost and conductivity, the potential savings of switching to aluminum wiring would depend on the length of the wires and the specific requirements of the electrical installation. In general, the cost savings from using cheaper aluminum wire may outweigh the slightly higher resistance due to its lower conductivity.
To calculate the exact savings, you would need to know the length and gauge (thickness) of the wires being used, as well as the specific electrical requirements of the house.
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Margaret is a marathon runner, and she knows that with her daily training schedule she needs to eat more protein than an average woman her age. being a lifelong runner, she is also cognizant about keeping her weight in check to avoid excessive strain on her knees and feet. since she also knows that excess proteins won’t increase her performance, but will be metabolized into fat and stored in her body, she wants to eat just the right amount of protein. margaret’s current weight is 115 lb. her schedule is very intense. she works as a physical therapist, runs at least 9 to 12 miles every day, and does moderate weight training for a half hour every day as well. she runs competition marathons once every 2 months. she is not a strength athlete. margaret loves lean meat like fish and chicken, and eats it at least five times per week. as a non-vegetarian endurance athlete, margaret needs 1.2-1.4 grams of protein/kg body weight daily. Calculate how many grams of protein margaret should consume on a daily basis.
Answers
Answer:
First, we need to convert Margaret's weight from pounds to kilograms:
115 lb ÷ 2.205 = 52.16 kg
Next, we can calculate the range of protein intake she needs:
1.2-1.4 grams of protein/kg body weight daily
So for Margaret:
1.2 g/kg x 52.16 kg = 62.59 g of protein per day (minimum)
1.4 g/kg x 52.16 kg = 72.82 g of protein per day (maximum)
Therefore, Margaret should consume between 62.59 g and 72.82 g of protein per day. It's important for her to stay within this range to support her intense training schedule, but avoid excess protein intake that can lead to weight gain
(HVAC) PLEASE HELP neeed helpp
Answers
Sump heater
Explanation
Calculate the areas under the stress-strain curve (toughness) for the materials shown in Fig. below, (a) plot them as a
function of temperature, and describe your observations. (b) As expected, the elastic modulus of the polymer decreases as
temperature increases. Using the stress-strain curves in the figure, make a plot of the modulus of elasticity versus the
temperature. Comment on the shape of the curve.
Answers
Answer:
Explanation:
Wow
determine the forces in members bc and fg of the loaded symmetrical truss. show that this calculation can be accomplished by using one section and two equations, each of which contains only one of the two unknowns.
Answers
The forces in members BC and FG of the loaded symmetrical truss can be determined by using one section and two equations, each of which contains only one of the two unknowns.
What is Force?
A force is an effect that can alter an object's motion according to physics. A force can cause an object with mass to accelerate when it changes its velocity, for as when it moves away from rest. An obvious way to describe force is as a push or a pull. A force is a vector quantity since it has both magnitude and direction. It is calculated using the newton SI unit (N). Force is denoted by the letter F. (formerly P).
The net force acting on an object is equal to the rate at which its momentum varies over time, according to Newton's second law in its original formulation.
The forces in members BC and FG of the loaded symmetrical truss can be determined by using one section and two equations, each of which contains only one of the two unknowns. By using the section, the force in member BC can be determined. By using the equation, the force in member FG can be determined.
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a vertical laminar flow hood should be cleaned: select one: a. starting on the right, wiping side to side and working back away from the user. b. starting on the left, wiping side to side and working back away from the user. c. starting in the front, wiping side to side and working back away from the user. d. starting in the back, wiping side to side and working forward toward the user.
Answers
When cleaning a vertical laminar flow hood, it is important to start in the front and work your way back to avoid contaminating the already cleaned areas. Wiping side to side helps to remove any particles or dust that may have accumulated on the surface of the hood. It is recommended to use a clean, lint-free cloth and a solution of 70% alcohol or a disinfectant approved for use in a cleanroom environment.
plssssssssssssss Alexi is writing a program which prompts users to enter their age. Which function should she use?
float()
int()
print()
string()
Answers
Answer:
int()
Explanation:
float() is using decimals, so that can't be it, like float(input( "how much does this cost?"))
print() is used to print something, not a user asking, like print("hello")
string() means like a whole, like string( I am good)
By elimination, int() is correct.
Hope this helps!
42. A vehicle has sagged rear springs and reduced rear curb riding height. This problem results
in?
A. Excessive positive camber on the front wheels
B. Excessive toe-out on the front wheels
C. Excessive positive caster on the front wheels
D. Excessive toe-in on the front wheels
43. On a vehicle equipped with rear parallel leaf springs and a solid rear axle, customer is
complaining that the vehicle reacts erratically (it darts) during turns. What is the most likely
cause of this complaint?
A. Incorrect ride height
B. Incorrect driveline angle
C. Loose rear axle U-bolts
D. Missing jounce/rebound bumpers
44. A power steering pump is being tested with a pressure gauge for maximum output pressure.
Which of the following statements is correct?
A. The pressure gauge should be attached to the pump return port
B. The steering wheel should be held in the right lock position
C. A maximum output pressure dead heading test should last no longer than 5 seconds
D. One should check output pressure with engine speed above 4000rpm
Answers
Answer:1. Driving under the influence of any drug that makes you drive unsafely is:
a. Permitted if it is prescribed by a doctor
b. Against the law
c. Permitted if it is a diet pill or cold medicine
2. Which fires can you put out with water:
a. Tire fires
b. Gasoline fires
c. Electrical fires
3. How far should a driver look ahead of the vehicle while driving:
a. 9-12 seconds
b. 12-15 seconds
c. 18-21 seconds
4. To prevent shifting, there should be at least one tie-down for ever ____feet of cargo: a. 10
b. 15 c. 18
5. Which of these statements about downshifting is true:
a. When you downshift for a curve, you should do so before you enter the curve
b. When you downshift for a hill, you should do so after you start down the hill
c. When you downshift for a curve, you should do so after you enter the curve
6. How do you test hydraulic brakes for a leak:
a. Move the vehicle slowly and see if it stops when the brake is applied
b. With the vehicle stopped, pump the pedal three time, apply pressure then hold
For five seconds and see it the pedal moves.
c. Step on the brake pedal and accelerator at the same time and see if the vehicle moves
7. For an average driver, driving 55 MPH on dry pavement, it will take about _____ to bring The vehicle to a stop:
a. Twice the length of the vehicle
b. Half the length of a football field
c. The length of a football field
8. You are driving a vehicle with a light load, traffic is moving at 35 MPH in a 55 MPH zone. The safest speed for your vehicle in this situation is most likely:
a. 30 MPH
b. 35 MPH
c. 40 MPH
9. Which of these is a good rule to follow when driving at night:
a. Keep your speed slow enough to stop within the range of your headlights
b. Look directly at oncoming headlights
c. Keep your instrument lights bright
10. A moving vehicle ahead of you has a red triangle with an orange center on the rear. What does this mean?
a. The vehicle is hauling hazardous materials
b. It may be a slow-moving vehicle
c. It may be oversized
11. You wish to turn right form a two lane two way street to make the turn. Which of these Drawings show how the turn should be made.
12. You are driving a heavy vehicle and must exit a highway using an offramp that curves downhill:
a. Use the posted speed limit for the offramp
b. Slow down to a safe speed before the turn
c. Wait until you are in the turn before downshifting
13. Which of these statements about using mirrors is true:
a. You should look at a mirror for several seconds at a time
b. There are “blind spots” that your mirror cannot show you
c. A lane change requires you to look at the mirrors twice
14. You must park on the side of a level, straight, two-lane road. Where should you place the three reflective triangles?
a. one within 10 feet of the rear of the vehicle, one about 100 feet to the rear and one about 200 feet to the rear.
b. One with 10 feet of the rear of the vehicle, one about 100 feet to the rear and one about 100 feet from the front of the vehicle
c. One about 50 feet from the rear of the vehicle, one about 100 feet to the rear and one about 100 feet from the front of the vehicle
15. Your vehicle is in a traffic emergency and may collide with another vehicle if you do not take action. Which of these is a good rule to remember at such a time?
a. Stopping is always the safest action in a traffic emergency
b. Heavy vehicles can almost always turn more quickly than they can stop
c. Leaving the road is always more risky than hitting another vehicle
16. The most important reason for being alert to hazards is:
a. Law enforcement personnel can be called
b. You will have time to plan your escape if the hazard becomes an emergency
c. You can help impaired drivers
17. You are traveling down a long, steep hill. Your brakes begin to fade and then fail. What should you do?
a. Downshift
b. Pump the brake pedal
c. Look for an escape ramp or escape route
18. The most common cause of serious vehicle skids is:
a. Driving too fast for road conditions
b. Poorly adjusted brakes
c. Bad tires
19. To avoid a crash, you had to drive onto the right shoulder. You are now driving at 40 MPH on the shoulder. How should you move back onto the pavement?
a. If clear, come to a complete stop before steering back onto the pavement
b. Brake had to slow the vehicle, then steer sharply onto the pavement
c. Keep moving at the present speed and steer very gently back onto the pavement
20. If
a. Slide sideways and spin out
b. Go straight ahead but will turn if you turn the steering wheel
c. Go straight ahead even if the steering wheel is turned
A rotor has been refinished on and off-car brake lathe, you should do all the following except
Answers
Inspect the rotor for damage, check thickness, clean, install properly, and torque lug nuts.
Defien torque.
Torque is a measure of the twisting force that causes an object to rotate around an axis or pivot point. It is often expressed in units of pound-feet (lb-ft) or Newton-meters (N-m). Torque is important in many mechanical applications, including automotive engineering, as it determines the ability of a vehicle's engine to generate power and move the vehicle forward. In the context of automotive engineering, torque is the force that is applied to the wheels to turn them and move the vehicle.
If a rotor has been refinished on and off-car brake lathe, here are some things you should do:
1. Inspect the rotor for any visible damage or defects, such as cracks, warping, or excessive wear.
2. Check the thickness of the rotor to ensure that it is still within the manufacturer's specifications.
3. Clean the rotor with brake cleaner to remove any debris or contaminants.
4. Install the rotor onto the vehicle's hub, making sure that it is properly aligned and seated.
5. Torque the lug nuts to the manufacturer's specifications.
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A mixture of perfect gases consists of 3 kg of carbon monoxide and 1.5kg of nitrogen at a pressure of 0.1 MPa and a temperature of 298.15 K. Using Table 5- 1, find (a) the effective molecular mass of the mixture, (b) its gas constant, (c) specific heat ratio, (d) partial pressures, and (e) density.
Answers
The main answers are a) effective molecular mass of the mixture: 0.321 kg/mol.; b) the gas constant of the mixture is 25.89 J/kg.K; c) specific heat ratio of the mixture is 1.4; d) partial pressures of carbon monoxide and nitrogen in the mixture are 8.79 kPa and 4.45 kPa respectively; e) the density of the mixture is 1.23 kg/m^3.
(a) The effective molecular mass of the mixture:
M = (m1/M1) + (m2/M2) + ... + (mn/Mn); Where m is the mass of each gas and M is the molecular mass of each gas. Using Table 5-1, the molecular masses of carbon monoxide and nitrogen are 28 and 28.01 g/mol respectively.
⇒M = (3/28) + (1.5/28.01) = 0.321 kg/mol
Therefore, the effective molecular mass of the mixture is 0.321 kg/mol.
(b) Gas constant of the mixture:
The gas constant of the mixture can be calculated using the formula: R=Ru/M; Where Ru is the universal gas constant (8.314 J/mol.K) and M is the effective molecular mass of the mixture calculated in part (a).
⇒R = 8.314/0.321 = 25.89 J/kg.K
Therefore, the gas constant of the mixture is 25.89 J/kg.K.
(c) Specific heat ratio of the mixture:
The specific heat ratio of the mixture can be assumed to be the same as that of nitrogen, which is 1.4.
Therefore, the specific heat ratio of the mixture is 1.4.
(d) Partial pressures:
The partial pressures of each gas in the mixture can be calculated using the formula: P = (m/M) * (R * T); Where P is the partial pressure, m is the mass of each gas, M is the molecular mass of each gas, R is the gas constant calculated in part (b), and T is the temperature of the mixture (298.15 K).
For carbon monoxide: P1 = (3/28) * (25.89 * 298.15) = 8.79 kPa
For nitrogen: P2 = (1.5/28.01) * (25.89 * 298.15) = 4.45 kPa
Therefore, the partial pressures of carbon monoxide and nitrogen in the mixture are 8.79 kPa and 4.45 kPa respectively.
(e) Density of the mixture:
The density of the mixture can be calculated using the formula: ρ = (m/V) = P/(R * T); Where ρ is the density, m is the mass of the mixture (3 kg + 1.5 kg = 4.5 kg), V is the volume of the mixture, P is the total pressure of the mixture (0.1 MPa = 100 kPa), R is the gas constant calculated in part (b), and T is the temperature of the mixture (298.15 K).
⇒ρ = (100 * 10^3)/(25.89 * 298.15) = 1.23 kg/m^3
Therefore, the density of the mixture is 1.23 kg/m^3.
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A roof vent must be a minimum of _____ feet high when the roof is used for anything other than weather protection.
Answers
A roof vent must be a minimum of seven feet high when the roof is used for anything other than weather protection. This measurement is designed to ensure that the vent is out of the range of people who may access the roof while the system is operating to remove contaminated air and is also a requirement of most building codes.
When a roof vent is installed, it must be done so in accordance with the manufacturer's instructions and any applicable building codes in the area. If the roof is used for any purpose other than weather protection, a minimum clearance must be maintained between the vent and any other object. This is to prevent the vent from becoming obstructed or causing any hazards to anyone on the roof.
Furthermore, roof vents must be installed in the correct location to ensure they are able to properly ventilate the area they are designed to serve, as well as to ensure that they do not create any additional issues, such as leaks or damage to the roof structure.
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The * key is used for ____.
Answers
DİGİTAL LOGİC DESİGN
Answers
Answer:
Uh- dude if you think I'm gonna download that, think twice...
the higher the nits of an lcd monitor or lcd screen, the dimmer the images.
Answers
The statement that "the higher the nits of an LCD monitor or LCD screen, the dimmer the images" is not necessarily true. Nits refer to the measurement of brightness or luminance that a display produces. The higher the nits, the brighter the display will be.
However, the brightness level of a display does not necessarily affect the quality of the images produced. In fact, a higher nits level can lead to better image quality and clarity, particularly in brightly lit environments.Brightness is a critical factor in determining the quality of an LCD screen. It is essential to have enough brightness to ensure that the images on the screen are visible and clear, especially in dimly lit environments. However, too much brightness can lead to eye strain and discomfort, particularly when viewing the display for extended periods.Therefore, the optimal level of brightness will depend on the specific use case and environment in which the display is being used. For example, a display with a higher nits level may be ideal for outdoor or brightly lit environments, while a lower nits level may be preferable for indoor use or in low-light environments.In summary, the statement that "the higher the nits of an LCD monitor or LCD screen, the dimmer the images" is not accurate. The level of brightness required will depend on the specific use case, and a higher nits level can lead to better image quality and clarity in the appropriate environment.
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3) Explain how dc machines Can work as motor and generator
Answers
The working principle of a DC machine is when electric current flows through a coil within a magnetic field, and then the magnetic force generates a torque that rotates the dc motor. The DC machines are classified into two types such as DC generator as well as DC motor.
3. The scale of the blueprint tells us the ________ of drawing to real space?
Boundary
Proportion
Weight
or
None of the above
Answers
The scale of the blueprint tells us the boundary of the drawing to real space. The correct option is a.
What is the scale of the blueprint?It is a photographic print in white on a bright blue background or blue on a white background, particularly useful for copying maps, mechanical drawings, and architect's designs
The plan of the construction is a project prediction that is slightly auto cad. The scale factor provides information on the dimensions and measurements of things represented by smaller copies in maps, blueprints, scale drawings, and scale models. The scale tells us how much actual length some length on the scale graphic represents.
Therefore, the correct option is a, Boundary.
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Draw a sinusoidal signal and illustrate how quantization and sampling is handled by
using relevant grids.
Answers
Explanation: Your mums gay
Which personal protective equipment (PPE) should you wear when working around asbestos-containing materials?
A) Respiratory protectionB) Protective work clothing, including gloves C) Face shields and/or vented goggles D) All of the above
Answers
Answer:
d
Explanation:
yea
Answer:
D
Explanation:
tìm phản lực gối tựa
Answers
Answer:
jwjehevrvbdbejd HB dbnwjsishrb t bxjwbkozkwnwn shxvbebhgvevhehjhr. jebn
Hey everyone!
This question is hard.
What specific fluid goes in the windshield wipers? (I never drove a car before)
And how much to put in fluid ounces? (So you don't blow a car up)
Answers
I’ve never driven either. But I’m pretty sure there is not really specific fluid you have to use. Just to name a few are Rain-X Bug Remover Windshield Washer Fluid, Prestone AS657 Deluxe 3-in-1 Windshield Washer Fluid.
For how much, there should be a little line or 3/4th of the way full.
Hope this helps!
Answer:
What specific fluid goes in the windshield wipers.
Distilled water
How much to put in fluid ounces?
There should be a tiny bit more than 3/4 of the way full.
if you have developed a video editing software product what process model will you choose and why??
Answers
Since the beginning of filmmaking, linear video editing has been a popular cutting technique. Before digital formats, editing methods for images and films were done on celluloid film.
Exactly why is software created?It is crucial for businesses since it enables them to stand out from rivals and increase their competitiveness. Software development may enhance customer experiences, increase the number of feature-rich and innovative goods available on the market, and increase the security, efficiency, and productivity of organizations.
Describe a software product.A computer product is simply technology that has been created and maintained again for advantage of a user base, frequently to fill a market demand. The majority of us use several software packages every day.
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The A-36 steel drill shaft of an oil well extends 12 000 ft into the ground. Assuming that the pipe used to drill the well is suspended freely from the derrick at A, determine the maximum average normal stress in each pipe string and the elongation of its end D with respect to the fixed end at A. The shaft consists of three different sizes of pipe, AB, BC, and CD, each having the length, weight per unit length, and cross-sectional area indicated.
Answers
check photo solvecheck photo solve
In an ungrounded electrical systems with conductors installed in grounded metal raceways and enclosures, what is the voltage from the current carrying conductors to the metal raceways and why?
Answers
In the ungrounded electrical circuits or systems, the circuit is one that is not or do not have the connection to the grounding electrode.
What is an ungrounded electrical system?An ungrounded system is known to be defined as a system that is known to be one that do not have an intentional connection to ground, and it has an exception of possibly going through potential indication or other kinds of devices.
Note that The neutral of an ungrounded system is one that is seen to be under reasonably balanced load conditions and thus it is one that is usually near to ground potential.
Hence, In the ungrounded electrical circuits or systems, the circuit is one that is not or do not have the connection to the grounding electrode.
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Compared to arc welding, which of the following statements are true about gas welding?
Select the 2 answer options that apply.
Slower than arc welding
Easier to control than arc welding
Faster than arc welding
Harder to control than arc welding
Answers
Answer: The two statements that apply to gas welding as compared to arc welding are:
1.Slower than arc welding
2.Easier to control than arc welding
Explanation: Gas welding is a slower process than arc welding because it requires heating the metal to be welded to a high temperature before the welding process can begin.
However, it is easier to control than arc welding because the welder can adjust the heat and flame of the gas torch to achieve the desired results. In contrast, arc welding requires more skill and practice to control the electric arc and produce a good weld.
Two added to four times a number, minus 3 times the number, equals 5.
Answers
x= 3.
Explanation:What is presented in this problem is basically an equation in verbal form.
1. Write the equation.
\(2+4x-3x=5\)
2. Solve for x.\(2+4x-3x=5\\ \\2+x=5\\ \\x=5-2\\ \\x=3\)
3. Express the result.x= 3.
A low-altitude meteorological research balloon, temperature sensor, and radio transmitter together weigh 2.5 lb. When inflated with helium, the balloon is spherical with a diameter of 4 ft. The volume of the transmitter can be neglected when compared to the balloon's size. The balloon is released from ground level and quickly reaches its terminal ascent velocity. Neglecting variations in the atmosphere's density, how long does it take the balloon to reach an altitude of 1000 ft?
Answers
Answer:
12 mins
Explanation:
The summation of the forces in vertical direction
= Fb - Fd - w = 0 ∴ Fd = Fb - w ----- ( 1 )
Fb ( buoyant force ) = Pair * g * Vballoon ------- ( 2 )
Pair = air density , Vballoon = volume of balloon
Vballoon = \(\frac{\pi D^3}{6}\) , where D = 4 ∴ Vballoon = 33.51 ft^3
g = 32.2 ft/s^2
From property tables
Pair = 2.33 * 10^-3 slug/ft^3
μ ( dynamic viscosity ) = 3.8 * 10^-7 slug/ft.s
Insert values into equation 2
Fb = ( 2.33 * 10^-3 ) * ( 32.2 ) *( 33.51 ) = 2.514 Ib
∴ Fd = 2.514 - 2.5 = 0.014 Ib ( equation 1 )
Assuming that flow is Laminar and RE < 1
Re = (Pair * vd) / μair -------- ( 3 )
where: Pair = 2.33 * 10^-3 slug/ft^3 , vd = ( 987 * 4 ) ft^2/s , μair = 3.8 * 10^-7 slug/ft.s
Insert values into equation 3
Re = 2.4 * 10^7 ( this means that the assumption above is wrong )
Hence we will use drag force law
Assume Cd = 0.5
Express Fd using the relation below
Fd = 1/2* Cd * Pair * AV^2
therefore V = 1.39 ft/s
Recalculate Reynold's number using v = 1.39 ft/s
Re = 34091
from the figure Cd ≈ 0.5 at Re = 34091
Finally calculate the rise time ( time taken to reach an altitude of 1000 ft )
t = h/v
= 1000 / 1.39 = 719 seconds ≈ 12 mins
mr. smith has allowed mrs. jones to run a sewer line through mr. smith's backyard so that mrs. jones has access to the city sewer system. this is an example of a(n):
Answers
Since Mr. Smith allowed Mrs. Jones to run a sewer line through Mr. Smith’s backyard so that Mrs. Jones has access to the city sewer system, this is an example of an: A. Easement.
What is an easement?An easement can be defined as a contractual agreement between two or more parties, wherein an individual is granted an access to a real property (land) for a specific purpose and a specific amount of time without possessing it, in exchange for a fee.
This ultimately implies that, an easement refers to the right of a landowner to make use of another person's nearby real property (land) for a specific purpose and a specific amount of time.
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Complete Question:
Mr. Smith has allowed Mrs. Jones to run a sewer line through Mr. Smith’s backyard so that Mrs. Jones has access to the city sewer system. This is an example of a(n):
a. Easement
b. Encumberance
c. Estate for years
d. Title assurance
Realiza las siguientes conversiones.
4 Hm2 a Dm2=_______________
21345 Cm2 a M2=_____________
0,592 Km2 a M2=______________
0,102 M2 a Cm2=______________
23911 Km2 a Hm2=_____________
Answers
Answer:
a) 4 hectómetros cuadrados equivalen a 400 decámetros cuadrados.
b) 21345 centímetros cuadrados equivalen a 2,135 metros cuadrados.
c) 0,592 kilómetros cuadrados equivalen a 592000 metros cuadrados.
d) 0,102 metros cuadrados equivalen a 1020 centímetros cuadrados.
e) 23911 kilómetros cuadrados equivalen 2391100 hectómetros cuadrados.
Explanation:
a) 4 hectómetros cuadrados a decámetros cuadrados:
Según las unidades de área y sus escalas utilizadas por el Sistema Internacional de Pesos y Medidas, un hectómetro cuadrado equivale a 100 decámetros cuadradps. Entonces, obtenemos el dato equivalente por la siguiente regla de tres simple:
\(x = 4\,Hm^{2}\times\frac{100\,Dm^{2}}{1\,Hm^{2}}\)
\(x = 400\,Dm^{2}\)
4 hectómetros cuadrados equivalen a 400 decámetros cuadrados.
b) 21345 centímetros cuadrados a metros cuadrados:
Según las unidades de área y sus escalas utilizadas por el Sistema Internacional de Pesos y Medidas, un metro cuadrado equivale a 10000 centímetros cuadrados. Entonces, obtenemos el dato equivalente por la siguiente regla de tres simple:
\(x = 21345\,cm^{2}\times \frac{1\,m^{2}}{10000\,cm^{2}}\)
\(x = 2,135\,m^{2}\)
21345 centímetros cuadrados equivalen a 2,135 metros cuadrados.
c) 0,592 kilómetros cuadrados a metros cuadrados:
Según las unidades de área y sus escalas utilizadas por el Sistema Internacional de Pesos y Medidas, un kilómetro cuadrado equivale a 1000000 metros cuadrados. Entonces, obtenemos el dato equivalente por la siguiente regla de tres simple:
\(x = 0,592\,km^{2}\times \frac{1000000\,m^{2}}{1\,km^{2}}\)
\(x = 592000\,m^{2}\)
0,592 kilómetros cuadrados equivalen a 592000 metros cuadrados.
d) 0,102 metros cuadrados a centímetros cuadrados:
Según las unidades de área y sus escalas utilizadas por el Sistema Internacional de Pesos y Medidas, un metro cuadrado equivale a 10000 centímetros cuadrados. Entonces, obtenemos el dato equivalente por la siguiente regla de tres simple:
\(x = 0,102\,m^{2}\times \frac{10000\,cm^{2}}{1\,m^{2}}\)
\(x = 1020\,cm^{2}\)
0,102 metros cuadrados equivalen a 1020 centímetros cuadrados.
e) 23911 kilómetros cuadrados a hectómetros cuadrados:
Según las unidades de área y sus escalas utilizadas por el Sistema Internacional de Pesos y Medidas, un kilómetro cuadrado equivale a 100 hectómetros cuadrados. Entonces, obtenemos el dato equivalente por la siguiente regla de tres simple:
\(x = 23911\,km^{2}\times \frac{100\,Hm^{2}}{1\,km^{2}}\)
\(x = 2391100\,Hm^{2}\)
23911 kilómetros cuadrados equivalen 2391100 hectómetros cuadrados.
Assume that a pond has a single outlet in the form of a small stream. The flow rate of that stream 2.3 m3/s. If the flow rate does not change, how many gallons of water will be lost in a week?
1b) Calculate the density of a 347.5 g sample of copper if it has a volume of 41.8 cm3.
Answers
1) The number of gallons of water lost in a week would be approximately (2.3 m³/s * 604,800 seconds) * (1000 liters/m³) * (0.264172 gallons/liter).
2) The density of the copper sample is approximately 8.32 g/cm³ (347.5 g / 41.8 cm³).
To calculate the number of gallons of water lost in a week, we first need to determine the volume of water that flows through the stream in one week.
Given:
Flow rate of the stream = 2.3 m³/s
To convert the flow rate to the volume of water in one week, we need to convert the time unit from seconds to weeks. There are 60 seconds in a minute, 60 minutes in an hour, 24 hours in a day, and 7 days in a week.
1 week = 7 days * 24 hours * 60 minutes * 60 seconds = 604,800 seconds
Volume of water in one week = Flow rate * Time
Volume of water in one week = 2.3 m³/s * 604,800 seconds
Now, let's convert the volume from cubic meters (m³) to gallons.
1 cubic meter = 1000 liters
1 liter = 0.264172 gallons
Volume in gallons = (Volume in cubic meters) * (1000 liters/m³) * (0.264172 gallons/liter)
Finally, we can calculate the number of gallons of water lost in a week.
Volume in gallons = (2.3 m³/s * 604,800 seconds) * (1000 liters/m³) * (0.264172 gallons/liter)
Please note that the flow rate might change due to various factors, but for the given scenario and assumptions, this calculation provides an estimate.
1b) To calculate the density of the copper sample, we'll use the formula:
Density = Mass / Volume
Given:
Mass of the copper sample = 347.5 g
Volume of the copper sample = 41.8 cm³
Density = 347.5 g / 41.8 cm³
=8.32 g/cm³
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