Steady - state temperatures (K) at three nodal points of a long rectangular rod are as shown. The rod experiences a uniform volumetric generation rate of 5 times 107 W/m3 and has a thermal conductivity of 20W/m middot K. Two of its sides are maintained at a constant temperature of 300 K. while the others are insulated.
Answers
The steady-state temperatures (K) at three nodal points of a long rectangular rod are 300 K, 300 K, and 299.68 K.
The steady-state temperatures (K) at three nodal points of a long rectangular rod can be calculated using the steady-state heat transfer equation.
Q. Steady-state temperatures (K) at three nodal points of a long rectangular rod are as shown. The rod experiences a uniform volumetric generation rate of 5 times 10^7 W/m^3 and has a thermal conductivity of 20 W/m·K. Two of its sides are maintained at a constant temperature of 300 K, while the others are insulated.
The steady-state heat transfer equation is given as:
${\frac{d^2T}{dx^2}}+{\frac{q"}{k}}=0$
Here, q'' is the rate of heat generation per unit volume and k is the thermal conductivity of the rod. Using the given data, q'' = 5 x 10^7 W/m^3 and k = 20 W/m·K.
The above equation can be rearranged to obtain the temperature distribution:
T(x) = -x^2/4 + A1x + A2
Here, A1 and A2 are constants that can be found by applying boundary conditions.
Boundary conditions:
(1) x = 0, T = 300 K
(2) x = L, T = 300 K
(3) ${\frac{dT}{dx}}$ at x = L/2 = 0.
Let's solve for A1 and A2 from boundary conditions (1) and (2).
From boundary condition (1), A2 = 300.
Substituting A2 in the above temperature equation:
T(x) = -x^2/4 + A1x + 300
From boundary condition (2), 300 = -L^2/4 + A1L + 300.
A1L = L^2/4
A1 = L/4
Substituting A1 in the temperature equation:
T(x) = -x^2/4 + Lx/4 + 300
Let's solve for L from boundary condition (3).
${\frac{dT}{dx}}$ at x = L/2 = 0.
-L/2 + L/4 = 0
L = 0.5 m
Substituting L = 0.5 m in the temperature equation:
T(x) = -x^2/4 + 0.125x + 300
The steady-state temperatures (K) at three nodal points can be calculated by substituting the values of x in the above equation.
(1) At x = 0, T(0) = 300 K
(2) At x = L/4 = 0.125 m, T(0.125) = -0.015625 + 0.015625 + 300
T(0.125) = 300 K
(3) At x = L/2 = 0.25 m, T(0.25) = -0.0625 + 0.03125 + 300
T(0.25) = 299.68 K
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Related Questions
e. add an id statement to use customer id as the identifying variable. submit the program. the results contain 35 observations.
Answers
After adding the ID statement and submitting the program, the results should contain 35 observations.
To add an "id statement" to use customer ID as the identifying variable, you would need to specify the ID variable in your data analysis software or program. The exact syntax will depend on the software you're using, but in many cases, you can specify the ID variable using a command like "id id_variable_name".
For example, in Stata, you would add the following code:
id customer_id
In R, you would use the following code to specify the customer ID as the row names:
rownames(data_frame) <- data_frame$customer_id
Note that you may also need to specify the data file containing the customer IDs if you haven't already loaded it into your program.
After adding the ID statement and submitting the program, the results should contain 35 observations.
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A light commercial building located in Philadelphia, Pa has construction and use characteristics much like a residence and design heating load of 120,000 Btu/h and cooling of 60,000 Btu/h. Determine the following: (a) Heating energy requirement, Btu(b) Gallons of No. 2 fuel oil/year, assuming efficiency of the furnace is 75 %(c) Cubic feet of natural gas/year(d) kWh of electricity for cooling for air conditioner with SEER of 8.5 using degree day method.(6 points)
Answers
Answer:
b
Explanation:
Calculate the rms value.
Answers
Answer:
(√6)/3 ≈ 0.8165
Explanation:
The RMS value is the square root of the mean of the square of the waveform over one period. It will be ...
\(\displaystyle\sqrt{\frac{1}{T}\left(\int_{\frac{T}{4}}^{\frac{3T}{4}}{1^2}\,dt+\int_{\frac{3t}{4}}^{\frac{5t}{4}}{(\frac{-4}{T}}(t-T))^2\,dt\right)}=\sqrt{\frac{1}{T}\left(\frac{T}{2}+\left.\frac{16}{T^2}\cdot\frac{1}{3}(t-T)^3\right|_{\frac{3t}{4}}^{\frac{5t}{4}}\right)}\\\\=\sqrt{\frac{1}{T}\left(\frac{T}{2}+\frac{T}{6}\right)}=\sqrt{\frac{2}{3}}=\boxed{\frac{\sqrt{6}}{3}\approx0.8165}\)
what is the condition for sampling frequency to reconstruct the information signal ?
Answers
A continuous time-varying 1-D signal is sampled by narrow sampling pulses at a regular rate fr = 1/T, which must be at least twice the bandwidth of the signal. At first, it may be somewhat surprising that the original waveform can be reconstructed exactly from a set of discrete samples.
What accident theory divides an accident into three phases: pre-contact, contact, and post-contact?
Answers
The accident theory divides an accident into three phases: pre-contact, contact, and post-contact is the domino theory.
What is the domino theory?The domino theory is a geopolitical theory that holds that changes in democracy in one country have a domino impact on surrounding countries.
The multiple-factor theory examines not just the three domino theory phases—precontact, contact, and post-contact—but also additional elements that influence an accident, such as management, machine, media, and man.
Therefore, the domino theory separates an accident into three phases: pre-contact, contact, and post-contact.
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what does network interface subsystem do
Answers
Answer:
It takes a single interface and creates multiple virtual interfaces with different MAC addresses. Essentially, it enables the creation of independent logical devices over a single ethernet device – “many to one” relationship in contrast to a “one to many” relationship where you map a single NIC to multiple networks.
Explanation:
I hope this helps (sorry if im wrong, this is all i could find)
a commercial refrigerator with r-134a as the working fluid is used to keep the refrigerated space at -35 c by rejecting waste heat to cooling water that enters the condenser at 18 c at a rate of 0.25 kg/s and leaves at 26 c. the refrigerant enters the condenser at 1.2 mpa and 50 c and leaves at the same pressure subcooled by 6 c. if the compressor consumes 3.3 kw of power , determine (a) the mass flow rate of the refrigerant, b) the refrigerant load, c) the cop, and d) the minimum power input to the compressor for the same refrigeration load.
Answers
At 1.2mpa pressure and 50c
What is pressure?
By pressing a knife against some fruit, one can see a straightforward illustration of pressure. The surface won't be cut if you press the flat part of the knife against the fruit. The force is dispersed over a wide area (low pressure).
a)Mass flow rate of the refrigerant
Therefore h1= condenser inlet enthalpy =278.28KJ/Kg
saturation temperature at 1.2mpa is 46.29C
Therefore the temperature of the condenser
T2 = 46.29C - 5
T2 = 41.29C
Now,
d)power consumed by compressor W = 3.3KW
Q4 = QL + w = Q4
QL = mR(h1-h2)-W
= 0.0498 x (278.26 - 110.19)-3.3
=5.074KW
Hence refrigerator load is 5.74Kg
(COP)r = 238/53
(Cop) = 4.490
Therefore the above values are the (a) mass flow rate of the refrigerant, b) the refrigerant load, c) the cop, and d) the minimum power input to the compressor for the same refrigeration load.
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How do I run a transient analysis in LTspice?
Answers
Answer:
Click "Simulate"-"Edit Simulation Cmd" in the menu bar to open the "Edit Simulation Command" screen. Select "Transient" and enter "10 m" for Stop time. You should now see ". tran 10m" at the bottom of the screen.
Explanation:
Avapor mixture containing 50.0 mole % benzene and 50.0 mole % toluene at 1 atm is cooled isobarically in a closed container from an initial temperature of 115°C. Use the Tsy diagram below to answer the following questions. 115 110 1400 1300 105 100 Vapor 1200 95 Temperature (°C) 90 Liquid 1100 1000 900 Pressure (mm Hg) Liquid 85 800 Vapor 80 700 75 70 600 500 0 1.0 65 0 10 0.2 0.4 0.6 0.8 Mole fraction henvene Polarm 0.2 0.4 0.6 0.8 Mole fraction benzene 7100 First Condensation Your answer is partially correct. At what temperature does the first drop of condensate form? 104 °C What is its composition? 0.20 mol benzene/mol
Last Condensate Your answer is partially correct. At what temperature does the last bubble of vapor condense? °C 98 What is its composition? 0.53 mol benzene/mol
Answers
Answer:
105°touch sensce what I could wathskb
lara sees her colleague taking a bribe from a customer. what should she do?
A. confront her colleague with a warning
B. tell her other colleagues and spread the news
C. ask for a stake in the bribe
D. gather evidence and approach a trusted supervisor
Answers
Answer:
D. Gather evidence an approach a trusted supervisor
Explanation:
B and C are obviously not the answer, A will probably not be useful since the colleague will most likely continue what they are doing
1. Consider a solid cube of dimensions 1ft x 1ft x 1ft (=0.305m x 0.305m x 0.305m). Its top surface is 10
ft (=3.05 m) below the surface of the water. The density of water is pf=1000 kg/m3.
Consider two cases:
a) The cube is made of cork (pB=160.2 kg/m3)
b) The cube is made of steel (pB=7849 kg/m3)
In what direction does the body tend to move?
Answers
Answer:
a) up
b) down
Explanation:
When the cube is less dense than water, it will tend to float (move upward). When it is more dense, it will sink (move downward).
a) 160.2 kg/m^3 < 1000 kg/m^3. The cube will move up.
__
b) 7849 kg/m^3 > 1000 kg/m^3. The cube will move down.
What does the following code display? public class RentalApp { public static void main(String[] args) { Rental r = new Rental(); r. SetNumOfPersons(5); r. AddPerson(); System. Out. Println(r. GetNumOfPersons()); } } public class Rental { private int numOfPersons; public int getNumOfPersons() { return numOfPersons; } public void setNumOfPersons(int numOfPersons) { this. NumOfPersons = numOfPersons; } public void addPerson() { numOfPersons = numOfPersons + 1; } } Group of answer choices 0 1 5 6
Answers
Answer:
Explanation:
The following code will display the number of persons in the Rental object after adding one person to it.
Since the Rental object's numOfPersons field is initialized to 0 by default and the setNumOfPersons method is called to set it to 5, calling the addPerson method will increase the value to 6.
Therefore, the code will display the value of 6.
The output of the code will be:
6
i hope that helped bro
1.3. If the surface tension coefficient of a fluid is 0,07 N/m and the radius
of the droplet is 2,5 mm. calculate:
1.3.1 surface tension force
(2)
1.3.2 difference in pressure of the droplet
(1)
Answers
Answer:
A) F = 0.011 N
B) ΔP = 5.6 N/m²
Explanation:
We are given;
surface tension coefficient; S = 0.07 N/m
Radius; r = 2.5 mm = 0.025 m
A) Formula to find the surface tension force(F) is given by;
F = SL
Where L is effective length = 2πr
F = 0.07 × 2π × 0.025
F = 0.011 N
B) Formula for difference in pressure droplet is;
ΔP = 2S/r
Thus;
ΔP = (2 × 0.07)/0.025
ΔP = 5.6 N/m²
compute the atomic packing factor for the rock salt crystal structure in which rc/ra = 0.414.
Answers
The atomic packing factor for the rock salt crystal structure in which rc/ra = 0.414 is 0.68.
How is this so?APF = (4 * (rA + rC)³) / (a³)
Where a is the lattice parameter of the crystal (the length of the side of the unit cell).
Plugging in the values, we get:
APF = (4 * (1.88 + 0.75)³) / (5.64³)
APF = 0.68
Therefore, the APF for the rock salt crystal structure with rC/rA = 0.414 is 0.68.
Note that the atomic packing factor is relevant in real life because it helps determine the density and structural stability of materials, influencing properties like strength, conductivity, and reactivity, which are crucial in various industries, including manufacturing, engineering, and materials science.
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What is the basic requirement of measurements?
Answers
The basic requirement of measurements is to have a standard or reference point against which to compare the quantity being measured. This standard or reference point should be well-defined and stable, and the measurement process should be repeatable and consistent. Additionally, it is important to ensure that the measurement equipment is calibrated and in good working condition.
Answer:
The most basic requirement for measurements is the presence of a standard or reference point against which the quantity being measured can be compared. The measurement process should be repeatable and consistent, and the standard or reference point should be well-defined and stable. Furthermore, ensure that the measurement equipment is calibrated and in good working order.
Explanation:
This assignment is specifically aligned to GA/ELO7: Sustainability and impact of engineering activity. Students must demonstrate critical awareness of the need to act professionally and ethically and to exercise judgment and take responsibility within own limits of competence. To demonstrate critical awareness of the sustainability and impact of engineering activity in this module particularly with respect to: 1.The role of engineering in society; 2. This risk assessment of and management, especially of the impact of engineering activity on society. Part 1: The business world and the place of business management
Your Task is to write an introduction of a report by involving the above mentioned and also involve the stuff on the case study below , this introduction must be 2 pages.
CASE STUDY
Industrial Waste Management
The waste management market and specifically the industrial market is growing rapidly as communities and individuals start to recognise the need to manage waste of all types more effectively and efficiently. The market is expected to grow in the next decade as factors such as strict government regulations and increased focus of industries towards energy and resource recovery focus attention in this business area. Increase focus on recycling and the increase in recyclable products is likely to increase significant opportunities to businesses to explore operating in the industrial waste management market. New entrants need to understand the market covering current trends and future opportunities. Businesses need to try to scan the environment using a focused competitive analysis to understand their competitors, and financial implications. Detailed SWOT analysis and ongoing development analysis is important in both the market, the micro- and macro-environments. As a customer, Samsung South Africa, for example is currently engaged in a process of finding established black industrialists in the e-waste sector, which require financial and business support, to take their business to the next level. This initiative is part of Samsung's R 280 m Equity Equivalent Investment Programme (EEIP), a DTI initiative where multinational companies are identified to participate and contribute positively towards B-BBEE in South Africa, in line with the objectives of the National Development Plan 2030. "Samsung is focussed on two very important missions - the growth of entrepreneurship in the country and the development of e-waste programmes. This e-waste project achieves both objectives and affirms our commitment to growing South Africa and preserving the nation's natural resources," says Hlubi Shivanda, Director: Business Innovation Group and Corporate Affairs at Samsung South Africa.
Answers
This report introduction discusses the growth of the industrial waste management market, the role of engineering, and Samsung's e-waste initiative as a case study.
The role of engineering in society is multifaceted, encompassing not only technological advancements but also ethical considerations and sustainability. As communities and individuals become more aware of the need to manage waste effectively, the industrial waste management market has witnessed rapid growth. This report aims to provide an in-depth analysis of the industrial waste management market, exploring current trends, future opportunities, and the impact of engineering activity on society.
The market for waste management is expected to continue its growth trajectory in the coming decade due to various factors, including stringent government regulations and the increasing focus of industries on energy and resource recovery. Moreover, the rise in recycling initiatives and the availability of recyclable products present significant opportunities for businesses operating in the industrial waste management sector.
To effectively navigate this market, new entrants must have a comprehensive understanding of the industry landscape, including the current trends and future prospects. Conducting a focused competitive analysis is crucial for businesses to identify their competitors and assess their financial implications. Furthermore, conducting a detailed SWOT analysis will aid in understanding the micro- and macro-environmental factors influencing the market and guide ongoing development strategies.
Case Study: Samsung South Africa's e-waste initiative showcases the integration of sustainable practices and social responsibility into business operations. As part of their Equity Equivalent Investment Programme (EEIP), Samsung is actively seeking established black industrialists in the e-waste sector, providing financial and business support to facilitate their growth. This initiative aligns with the objectives of the National Development Plan 2030 and highlights Samsung's commitment to fostering entrepreneurship and addressing e-waste challenges.
The objectives of this report are to analyze the industrial waste management market, identify emerging opportunities, and assess the sustainability and impact of engineering activity in this sector. By critically evaluating the role of engineering in society and considering risk assessment and management, we aim to provide insights that contribute to informed decision-making and responsible engineering practices.
In conclusion, the industrial waste management market presents significant growth potential driven by increasing environmental awareness, government regulations, and the emphasis on resource recovery. The case study of Samsung South Africa exemplifies the integration of sustainable practices into business operations. Through this report, we will delve into the complexities of the market, emphasizing the importance of acting professionally, ethically, and responsibly within the limits of our competence as engineers. By doing so, we can contribute to a more sustainable and impactful engineering industry.
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Question:
Why is my step-sis stuck in the washing machine every day?
———————————————————————————————-
Please, answer quick! I really need help figuring this out.
Answers
Let X and Y be independent Bernoulli variables such that P(X = 1) = p, P(Y = 1) = q for some 0 ≤ p, q ≤ 1. Find P(X ⊕2 Y = 1)
Answers
Answer:
dddddddddddddddddddddddddddddddddddddd
Explanation:
Which of the two following four options have been shown by research to be generally not as effective a method for studying which two methods are more likely to produce illusions of complete in learning
Answers
The answer choices that have been shown by research to be generally not as effective a method for studying and the methods that are more likely to produce illusions of competence in learning are:
rereadinghigmappingWhat is Studying?This refers to the act or process of reading material in order to gain new knowledge about a topic and to retain the information in long-term memory.
Hence, we can see that from the complete text, there are different options given and the results of research that showed that they are not very effective for studying and they are:
rereadinghigmapping
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If you press SHIFT while you drag a corner sizing handle of a shape on a slide, what happens?The proportions of the shape are maintained as you resize the shape.The alignment of the shape with the other shapes on the slide stays the same.The style of the shape changes to the next style in the Shape Styles gallery.The shape snaps to the closest slide border.
Answers
If you press SHIFT while you drag a corner sizing handle of a shape on a slide, the proportions of the shape are maintained as you resize the shape.
When you resize a shape on a slide, it's important to maintain the proportions so that the shape doesn't look distorted. By holding down the SHIFT key while you drag a corner sizing handle, PowerPoint automatically maintains the shape's proportions for you.
In PowerPoint, you can resize shapes by clicking and dragging any of the sizing handles that appear when you select the shape. However, if you want to maintain the proportions of the shape as you resize it, you can hold down the SHIFT key while you drag a corner sizing handle. When you do this, PowerPoint automatically adjusts the other sizing handles to maintain the shape's original proportions. This means that the shape will look the same, but larger or smaller, depending on how you resize it. It's important to note that holding down SHIFT while you resize a shape doesn't affect its alignment with other shapes on the slide. The shape will still stay in the same position relative to other objects, unless you manually move it. Also, holding down SHIFT while you resize a shape doesn't change its style. The shape will maintain its original style unless you apply a new style from the Shape Styles gallery. Lastly, holding down SHIFT while you resize a shape doesn't affect its placement on the slide. The shape will still stay within the slide border, unless you manually move it outside of the slide area.
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what are difference between conic sectional and solids?
Answers
Answer:
Conic Sections
a conic section is a curve which is obtained when a surface performs an intersection with a plane. The types of conic sections include hyperbola, parabola and ellipse. A circle can also be considered as a conic section.
Conic Solids on the other hand are the set of points on any segment between a region and a point which is not present in the plane of the base. They are solids with one base.
* Question 1: Design alarm system as shown below. The alarm turns on when one of the following
conditions happened:
A. Motion IR sensor & window sensor
activated.
B. Motion IR sensor & door sensor
activated.
C. Otherwise the buzzer off.
(A)
Warning
Motion
Sensors
Buzzer
Suppose that: Warning buzzer on pin 8
Motion sensor on pin 5
Window sensor on pin 6
Door sensor on pin 7
The buzzer works on beating mode.
(C)
Door
sensor
TE
(B)
Window
Sensors
Answers
Answer:
A
Explanation:
elements of parallel computing
Answers
\(\huge{\orange}\fcolorbox{purple}{cyan}{\bf{\underline{\green{\color{pink}Answer}}}} \)
Elements of parallel computing:Computer systems organization. Computing methodologies. General and reference. Networks. Software and its engineering.Theory of computation.What is a transition? A. An animation that happens on a single slide B. An outline format that uses roman numerals C. An image file imported to a title slide D. An effect that happens between slides Please select the best answer from the choices provided A B C D
Answers
Answer:
its c
Explanation:
A Boeing 777 lands at Chicago O'Hare Airport (668 m elevation) where the pressure is 98. 8 kPa. This 777 wing has a coefficient of lift of 1. 46, and its wing area is 4618. 8 ft2. When the plane left St. Louis, its mass was 225,982 kg. Note that kilograms is mass not weight, so you need to convert it. During the flight to Chicago, 7,534 liters of fuel was used, where the jet fuel weighs 0. 781 kg/L. What is the velocity in miles-per-hour at the point where the aircraft initially touches the ground?
Answers
In their favorite 10 criminal cases cracked open by paranormal research on the dead files that they picked and the season 5 episode in Jamaica about the white witch of rose hall that they included; Annie palmer was rumored to have killed three husbands on the property.
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If you are creating an artificial cell and you want this cell to be capable of the greatest sensitivity to an applied signal, which would be the most useful?.
Answers
Artificial cells have received a lot of attention as potential replacements for natural cells. There are numerous types of artificial cells, each with its own definition.
What is an Artificial cells?
Artificial cells are materials that have been engineered to mimic some of the properties of cells, such as surface characteristics, shapes, morphology, or a few specific functions.
These artificial cells have applications ranging from medicine to the environment, and they may be useful in developing theories about the origin of life. However, even the most basic unicellular organisms are extremely complex, and the synthesis of living artificial cells from inanimate components appears to be extremely difficult.
Nonetheless, recent progress in the creation of artificial cells ranging from simple protocells and synthetic cells to cell-mimic particles suggests that the creation of living life is no longer an impossible goal.
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Ball A of mass mA and ball B of mass mB are connected with a string of length l. Initially, the string is loose and the distance between the two balls is b. At time t0, ball B is given a velocity of v0 perpendicular to the line connecting A and B. At time t1, the distance between A and B becomes l and the string becomes taut. We want to find the velocities of each ball right after the string becomes taut.
(a) Choose an inertial frame and a set of coordinates to describe the motion of the balls. Write the position, velocity, and acceleration (kinematics) of both
the balls.
(b) Is the linear momentum of the two-ball system conserved? Why?
(c) Is the angular momentum of ball B conserved right before and right
after the string becomes taut around any point or points? Explain (one to two sentences).
(d) What are the linear momenta of A, B and the two-ball system right
before and right after the string becomes taut?
(e) Find the position and velocity of the center of mass of the system right
before and right after the string becomes taut?
(f) What is the linear impulse applied by the string on A as the string becomes taut?
Answers
In this case, if there are no external forces (such as friction or external impulses), the linear momentum of the system will be conserved.
(a) Inertial Frame and Coordinates:
Let's choose an inertial frame of reference where ball A is at the origin (0,0) and ball B initially has a position of (b,0).
We can choose the x-axis along the line connecting A and B, and the y-axis perpendicular to it. The positive x-direction is from A to B, and the positive y-direction is upward.
The position, velocity, and acceleration of each ball can be described as follows:
Ball A:
Position: rA(t) = (0, 0) [remains fixed at the origin]
Velocity: vA(t) = (0, 0) [no initial velocity or acceleration]
Acceleration: aA(t) = (0, 0) [no initial velocity or acceleration]
Ball B:
Position: rB(t) = (b, 0) [initial position at (b, 0)]
Velocity: vB(t) = (v0, 0) [given initial velocity in the positive x-direction]
Acceleration: aB(t) = (0, 0) [no initial acceleration]
(b) Conservation of Linear Momentum:
The linear momentum of the two-ball system is conserved if there are no external forces acting on the system.
(c) Conservation of Angular Momentum:
Right before and right after the string becomes taut, the angular momentum of ball B is conserved around any point because no external torques act on the system. The string only provides tension forces along the line connecting A and B, causing no torque.
(d) Linear Momenta:
Right before the string becomes taut:
Linear momentum of ball A: pA = mAvA = (0, 0) [zero initial velocity]
Linear momentum of ball B: pB = mBvB = (mBv0, 0) [initial velocity in the positive x-direction]
Linear momentum of the two-ball system: pSystem = pA + pB = (mBv0, 0)
Right after the string becomes taut:
Linear momentum of ball A: p'A = mAvA = (0, 0) [zero velocity]
Linear momentum of ball B: p'B = mBv'B [velocity to be determined]
Linear momentum of the two-ball system: p'System = p'A + p'B = (0, 0) + (mBv'B, 0) = (mBv'B, 0)
(e) Center of Mass:
Right before the string becomes taut:
Position of the center of mass: rCM = (mArA + mBrB) / (mA + mB) = (mBb, 0) / (mA + mB)
Right after the string becomes taut:
Position of the center of mass: r'CM = (mAr'A + mBr'B) / (mA + mB) = (0, 0) [both balls are at the origin]
Velocity of the center of mass remains zero throughout since the balls have zero net momentum.
(f) Linear Impulse:
The linear impulse applied by the string on ball A as the string becomes taut is equal to the change in momentum of ball A.
Thus, since ball A has zero initial velocity and final velocity, the linear impulse is zero.
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Common household electric current is called alternating current because the current alternates direction within the wires. The voltage V in a typical -volt outlet can be expressed by the function , where is the angular speed (in radians per second) of the rotating generator at the electrical plant and is the time measured in seconds. It is essential for electric generators to rotate at precisely cycles per seconds. How many times does the current oscillate in seconds?
Answers
The number of times the current oscillates in one second is the reciprocal of the period, which is f = 60 oscillations per second.
The given equation is V = Vmax sin(ωt),
where Vmax = Vrms √2 and ω = 2πf.
In this problem, the voltage V in a typical -volt outlet can be expressed by the function V = Vmax sin(ωt), where ω is the angular speed (in radians per second) of the rotating generator at the electrical plant and t is the time measured in seconds.
Therefore, ω = 2πf = 2π(60 Hz) = 120π rad/s.
It is given that "It is essential for electric generators to rotate at precisely cycles per second."
Thus, the frequency is f = 60 Hz, which means that the current oscillates 60 times in one second.
Another way of solving this problem is to use the period of the voltage wave, which is given by T = 1/f.
Therefore, T = 1/60 = (1/60) s. The number of times the current oscillates in one second is the reciprocal of the period, which is f = 60 oscillations per second.
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What is a flat bottom boat called?
Answers
Punts, originally used as freight and angling boats, are shallow-water craft with a flat bottom and a square-cut bow.
A flat-bottomed hull is what?Flat-bottomed hulls are made to float on the water's surface while moving very little. Due to the absence of resistance, flat-bottomed boats can travel pretty quickly, but if the sea is rough at all, the hulls will pound into each swell, making for an extremely unpleasant ride.
Is the bottom of a bass boat flat?Bass boat and flats boats are both stable, and whose hulls are made for a shallow draft; as a result, they are typically more flat than that of the wider hulls of boats built to cruise offshore, in choppy seas.
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Legal metrology would protect consumers from businesses that do not take measurements according to defined measuring regulations.
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From what my research concluded, true
Za answa iz:
True
Twust meh