u are an engineer in an electric-generation station. you know that the flames in the boiler reach a temperature of 1200 k and that cooling water at 300 k is available from a nearby river. w
Answers
The plant efficiency will be 75%.
We have a engineer in a Electric - Generation Station.
We have to determine the maximum efficiency plant will ever achieve.
What is the formula to calculate the maximum efficiency achieved by the plant ?The maximum efficiency the plant will achieve is defined as -
η(max) = 1 - \($\frac{T_{min} }{T_{max} }\)
Now -
T(minimum) = Temperature of Cooling water = 300 K
T(maximum) = Temperature of boiler = 1200 K
Therefore -
The maximum efficiency will be -
η(max) = 1 - \(\frac{300}{1200}\)
η(max) = 1 - \(\frac{1}{4}\)
η(max) = 3/4
Percentage efficiency = \(\frac{3}{4} \times 100\\\) = 3 x 25 = 75%
Hence, the plant efficiency will be 75%.
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[ The given question is incomplete. The complete question is given below -
You are an engineer in an electric-generation station. You know that the flames in the boiler reach a temperature of 1200 K and that cooling water at 300 K is available from a nearby river. What is the maximum efficiency your plant will ever achieve? ]
Related Questions
A pendulum has a velocity of 2.5 m/s at the bottom of its swing. Using the law of conservation of energy, what is the maximum height of the pendulum's swing if there is no friction acting on it?
Answers
Answer:
The maximum height of the pendulum's swing is 0.32 m
Explanation:
The Principle Of Conservation Of Mechanical Energy
In the absence of friction, the total mechanical energy is conserved. That means that
Em=U+K is constant, being U the potential energy and K the kinetic energy
U=mgh
\(\displaystyle K=\frac{mv^2}{2}\)
At the bottom of the swing, the pendulum has zero potential energy but its kinetic energy is at maximum. At the top of the swing, the pendulum has zero kinetic energy and the potential energy is at maximum.
Thus, applying the principle of conservation of mechanical energy:
\(\displaystyle mgh = \frac{mv^2}{2}\)
Simplifying by m:
\(\displaystyle gh = \frac{v^2}{2}\)
Solving for h:
\(\displaystyle h = \frac{v^2}{2g}\)
Substituting:
\(\displaystyle h = \frac{2.5^2}{2*9.8}\)
h = 0.32 m
The maximum heigth of the pendulum's swing is 0.32 m
what is the isoelectric point (pi) of the following peptide? ala-cys-ile-lys-asp-met
Answers
The isoelectric point (pI) of a peptide is the pH at which the peptide has no net charge, i.e., it has equal numbers of positive and negative charges.
To calculate the pI of a peptide, we need to know the pKa values of the ionizable groups in the peptide, which are the amino and carboxylic acid groups of each amino acid residue.
The pKa values of the amino and carboxylic acid groups vary depending on their chemical environment and the neighboring amino acids. However, we can use some approximations to estimate the pI of a peptide.
For the peptide Ala-Cys-Ile-Lys-Asp-Met, we need to consider the pKa values of the following ionizable groups: the amino group of Ala (pKa ~ 9.7), the thiol group of Cys (pKa ~ 8.3), the alpha-carboxylic acid group of Asp (pKa ~ 3.9), and the alpha-amino group of Lys (pKa ~ 10.8).
To estimate the pI of the peptide, we need to find the pH at which the net charge of the peptide is zero. We can do this by considering the ionization states of the amino and carboxylic acid groups at different pH values and calculating the net charge of the peptide.
At a pH below the pKa of the carboxylic acid group of Asp, the group is protonated and carries a positive charge. At a pH above the pKa of the amino group of Lys, the group is deprotonated and carries a negative charge. At a pH between these two pKa values, the net charge of the peptide is positive due to the protonated amino and carboxylic acid groups. As the pH increases, the carboxylic acid group of Asp loses its proton and becomes neutral, and the net charge of the peptide decreases. At a pH above the pKa of the thiol group of Cys, the group is deprotonated and carries a negative charge, further decreasing the net charge of the peptide.
Using these considerations, we can estimate the pI of the peptide to be between 6 and 7.5, depending on the exact pKa values and the neighboring amino acids.
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for an object in simple harmonic motion with amplitude a, the kinetic energy will equal the potential energy when the displacement is
Answers
The kinetic energy will equal the potential energy when the displacement is equal to the amplitude a, i.e., at the points where the object is farthest from the equilibrium position.
For an object in simple harmonic motion, the potential energy and kinetic energy are given by:
Potential energy (PE) = (1/2) kx²
Kinetic energy (KE) = (1/2) mv²
where k is the spring constant, x is the displacement from the equilibrium position, and v is the velocity.
At any point during the motion, the total mechanical energy (the sum of kinetic and potential energy) remains constant.
At the equilibrium position (where x = 0), all the energy is kinetic, and there is no potential energy.
At the maximum displacement (where x = a), all the energy is potential, and there is no kinetic energy.
Therefore, the kinetic energy will equal the potential energy when the displacement is equal to the amplitude a, i.e., at the points where the object is farthest from the equilibrium position.
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What type of reaction results in the formation of a salt?
Answers
by what factor does the jinetic energy of a car change when its speed is tripled?
Answers
Answer:
9
Explanation:
Which of the following statements about developing a personal fitness program is NOT true?
A When developing a personal fitness program, it is important to implement strategies that will help
maintain the program as well as give it a successful start
B. Personal factors such as age, health concerns, and likes are important to consider when developing
a personal fitness program
C. The starting skill level of the physical activities included in a personal fitness program should be
determined from other individuals' fitness programs
D. The FITT principle should be used when developing a personal fitness program,
Please select the best answer from the choices provided
A
B
Save and Exit
Next
Answers
Answer:
C
Explanation:
The starting skill level of the physical activities included in a personal fitness program should be determined from other individuals' fitness programs is a statement which is not true. Everyone starts their personal fitness journey at a different level which should be regarded . A fitness test should be taken to determine where an individual should start their new lifestyle.
Answer:
C. I got it right :)
Explanation:
a force of 1.8 extends a wire by 0.4. what force will extend wire by 1.25cm if the elastic limit is not exceeded.
Answers
Answer:0.27
Explanation:
Please answer correctly
No trolling or links, please
Answers
Answer: Wave a the first answer is right
Brainliest.
Explanation:
Q.7. For a system with a transfer function of G(s)=- co² s² +2a+w² if the natural frequency is 0.5 and the damping ratio is 1.3, which of the following statements is correct regarding the unit step response of the system?
O A) Damped
O B) Undamped
O C) Underdamped
O D) Crittically Damped
O E) Overdamped
Answers
The system described by the transfer function G(s) = -co² s² + 2a + w², with a damping ratio of 1.3 and a natural frequency of 0.5, has an overdamped unit step response. So, the correct option is (E)
The transfer function of the system is given as G(s) = -co² s² + 2a + w², where co represents the damping ratio, a represents an arbitrary constant, and w represents the natural frequency of the system. We are given that the natural frequency is 0.5 and the damping ratio is 1.3.
To determine the type of unit step response, we need to analyze the damping ratio (co) in relation to the critical damping value (co_critical).
The critical damping ratio (co_critical) is defined as the value where the system is on the threshold between being overdamped and underdamped. It is given by the formula co_critical = 2 * sqrt(a * w²).
In our case, the natural frequency (w) is 0.5, so we can calculate co_critical as follows: co_critical = 2 * sqrt(a * 0.5²).
Since the damping ratio (co) is given as 1.3, we can compare it with co_critical to determine the type of unit step response.
If co > co_critical, the system is considered overdamped (Option E).
If co = co_critical, the system is considered critically damped (Option D).
If co < co_critical, the system is considered underdamped (Option C).
Based on the given values, we can determine that the system is overdamped (Option E) because the damping ratio (1.3) is greater than the critical damping ratio.
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A force of 5N accelerates a mass by 2 m/s². What will be the acceleration if the force and mass were increased to twice their original value?
Answers
Answer:
4m/s4
Explanation:
What is the kinetic energy of a car with a mass of 1781 kg if it's traveling at 19.33 m/s? Submit your answer in exponential form.
Answers
332734.34 Joules
Explanation
Kinetic energy is a form of energy that an object or a particle has by reason of its motion and mass, it is represented by the expression
\(\begin{gathered} E_k=\frac{1}{2}mv^2 \\ where\text{ m is the mass} \\ v\text{ is the velocity} \\ the\text{ unit for kinetik energy is Joules} \\ 1\text{ Joule} \\ 1\text{ Joule=kg}\frac{m^2}{s^2} \end{gathered}\)then
Step 1
a) Let
\(\begin{gathered} mass=\text{ 1781 Kg} \\ v=19.33\frac{m}{s} \end{gathered}\)b) now,replace in the formula:
\(\begin{gathered} E_{k}=\frac{1}{2}mv^{2} \\ E_k=\frac{1}{2}(1781kg)(19.33\frac{m}{s})^2 \\ E_k=332734.34\text{ Joules} \end{gathered}\)therefore, the answer is 332734.34 Joules
I hope this helps you
Johnny kicked a football from a hill 20 meters tall. The ball leaves at a 45.0 degree angle with an initial velocity of 30.0 m/second. How many seconds was the ball in the air? Report your answer to 3 sig figs. Seconds
Answers
Answer:
The value is \(t = 5.124 \ s\)
Explanation:
From the question we are told that
The height of the tree is \(s = 20 \ m\)
The angle the ball leaves is \(\theta = 45^o\)
The initial velocity is \(u = 30.0 \ m/s\)
Generally the vertical of the ball's initial velocity is mathematically evaluated as
\(u_y = u * sin (45)\)
=> \(u_y =- 30 * sin (45)\)
=> \(u_y = -21.21 \ m/s\)
Here \(u_y\) is negative because it is in the direction of the negative y-axis
Generally from kinematic equation we have
\(s = u_yt + \frac{1}{2} g t^2\)
=> \(20= -21.21 t +4.9 t^2\)
=> \(4.9 t^2 -21.21 t- 20= 0\)
Solving using quadratic formula we have that
\(t = 5.124 \ s\)
I NEEEED HELPPPP PLEASDEEE
Answers
Answer:
2100 m
2804 g
4 '2 mm squares'
20,000 photos
Explanation:
1.5 km = 1500 m
1500 m + 600 m = 2100 m
2.8 kg = 2800 g
2800 g + 4 g = 2804 g
8mm tube / 2 mm squares
4 can fit
1 Gb = 1000 mb
40 Gb = 40,000 mb
40,000 mb / 2 mb = 20,000 photos
Here's all the help you need:
1). 1 km = 1,000- m
2). 1 kg = 1,000 g
3). Freebie. 2 fits into 8 four times.
4). 1 mega... = 1,000 kilo...
5). 1 Giga... = 1,000 Mega...
as the discount rate increases, the present value of $2,000 to be received four years from now:
Answers
The present value of $2,000 to be received four years from now will decreases with increase in the discount rate.
This is because the discount rate represents the opportunity cost of money - in other words, the rate of return that could be earned by investing the money elsewhere.
When you calculate the present value of a future sum of money, you discount it back to the present using the discount rate. The more the discount rate, the high the future cash flow is discounted, and the lesser its present value.
For example, let's say the discount rate is 5% per year. The present value of $2,000 to be received four years from now would be
PV = $2,000 / \((1+0.05)^{4}\)
PV = $2,000 / 1.2155
PV = $1,646.57
Now let's say the discount rate increases to 10% per year. The present value of the same $2,000 cash flow would be
PV = $2,000 / \((1+0.1)^{4}\)
PV = $2,000 / 1.4641
PV = $1,364.87
As you can see, the present value has decreased from $1,646.57 to $1,364.87 as the discount rate has increased from 5% to 10%. This is because the higher discount rate reduces the value of future cash flows in today's dollars.
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What will happen if the positive and negative connections on the voltmeter are reversed?
Answers
If the applied voltage is polarised in the opposite direction (negative on red and positive on black), the metre will display "backwards."
What happens when polarity reverses?Some devices may be electrically charged at all times if an outlet has reverse polarity. Electricity will flow to the switch in a properly connected outlet; with reversed polarity, it will be present in the item even when it is not switched on.Reverse polarity protection is an internal circuit that ensures the device is not destroyed if the polarity of the power source is reversed. The reverse polarity protection circuit disables power to the transmitter or transducer's sensitive electronic circuitry.If you reside in a house that has had amateur electrical work done, there's a strong chance you have some outlets with reversed polarity. That essentially means that some of your channels may surprise you. Uh oh! While not all shocks are lethal, they are all painful and unpleasant. Only a qualified electrical contractor in North Scottsdale, AZ can perform electrical repairs in your home.
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4 major functions of the skeletal system
Answers
The functions of the skeletal system are support, movement, production of cells and protection.
The bones, muscles, ligaments, and tendons make up a skeletal system in the human body. It serves as body's support system to enable correct movement and bodily function. The skeleton gives the entire body structural support, allowing us to sit, stand, and move freely. In addition, fragile organs the brain, heart, and lungs are safeguarded by the bones of the skull, ribs, and spinal column.
Additionally, the skeletal system makes blood cells and stores minerals. The production of these cells, and platelets all essential for immune system and blood clotting take place in the bone marrow, which is found inside numerous bones. In addition, our ability to move and engage in activities like running, jumping, and dancing is made possible by our bones working in tandem with our muscles and joints.
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an action/reaction pair of forces acts on different objects or same object?
Answers
Action-reaction pairings are forces that act on separate objects in opposite directions and at identical magnitudes. Never do they impact the same thing.
The same object or separate objects are subjected to the influence of both action-reaction forces.Action & friction force act on two separate bodies, as stated by Newton's third law. A pair is not an action and response pair if two equivalent and opposing forces operate on the same body.
An action-reaction pair is composed of what forces?The third law of mobility by Newton states that equivalent but diametrically opposed forces usually act in pairs. There is an identical yet distinct reaction to every action, to put it another way. This implies that when you pushed against a wall, the ceiling pushes back against you with an equal amount of force.
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Which of the following is NOT a piece of evidence for the Big Bang Theory?
Ratio of Hydrogen and Helium to other elements
Expanding Universe
Black Holes
Cosmic Microwave Background Radiation
Answers
um the answer is A
np :3 i hope this is right
How long does it take for the entire pattern of moon phases to be completed?.
Answers
Answer:
it takes our Moon about 29.5 days to complete one cycle of phases (from new Moon to new Moon).
It averages 29.531 days.
Someone help with this year 10 physics question please!
Answers
Answer:
22 m/s at 3 seconds
Explanation:
acceleration is 4m/s^2 before 3 seconds
4*3 = 12
add current speed
10+12=22
What is the name of this atom? I
Answers
Answer:
cerro azul
Explanation:
I reverse image searched and it popped up with a name.
Answer:
Helium is the name of the atom
Two points are located 4.2 m apart. If the potential difference between the two points is 44.4 V, what is the electric field (in V/m) between the points?
Answers
To find the electric field between the two points, we can use the formula. So, the electric field between the two points is approximately 10.57 V/m.
Electric field = Potential difference / Distance between the points
Plugging in the given values, we get:
Electric field = 44.4 V / 4.2 m
Electric field = 10.57 V/m
Therefore, the electric field between the two points is 10.57 V/m.
To find the electric field between two points with a potential difference, you can use the formula:
Electric Field (E) = Potential Difference (V) / Distance (d)
In this case, the two points are 4.2 meters apart and the potential difference between them is 44.4 V. Plugging these values into the formula, we get:
E = 44.4 V / 4.2 m
E ≈ 10.57 V/m
So, the electric field between the two points is approximately 10.57 V/m.
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Convert 0.4 cm to km.
Answers
A box is pushed by a force of 15 N and accelerates 2 m/s2. What is the mass of the box?
Answers
Answer:
7.5 kgExplanation:
The mass of the box can be found by using the formula
\(m = \frac{f}{a} \\ \)
f is the force
a is the acceleration
From the question we have
\(m = \frac{15}{2} = 7.5 \\ \)
We have the final answer as
7.5 kgHope this helps you
At a science museum, a stationary bicycle is connected to an electric generator. By pedaling steadily, a museum visitor is able to keep a 75-watt light bulb fully lit for 45 seconds. 16. (1 pt.) What is the total energy, in kilojoules, consumed by the light bulb during this time? 17. (1 pt.) Suppose that only (10.-20.3% of the person's food-energy is actually delivered to to the light bulb as electrical energy, while the remainder is expended on biological processes, friction, and other inefficiencies in the bicycle and generator. (Laulima will contain a randomized value within the range shown) How many dietary Calories of food-energy did the person use during the time described above? Questions #18-19: A particular kitchen blender delivers 1100 watts of mechanical power while blending the mixed fruit in its carafe to make a smoothie. Assume that 100% of this power is absorbed by the food as the blades spin. 18. (1 pt.) If the blender runs for 23 seconds, what is the total energy, in kilojoules, delivered to the food? 19. (1.5 pts.) If the food has a total mass of (1.0-2.0) kg and an average specific heat capacity of (3.0-4.0) kJ/(kg-K), what is the average temperature increase of the food, in degrees Celsius? (Laulima will contain randomized values within the ranges shown.) Assume rapid heat transfer and mixing within the food, and that 100% of the heat remains in the food. Assume no phase transitions for the food. 20. (2 pts.) A 2.20-kg iron pot contains 3.00 kg of water, all initially at 25.0°C. A hot iron horseshoe with a mass of (300.-600.) grams is dropped into the water. After the pot, horseshoe, and water all reach thermal equilibrium, the final temperature of all three is 33.0°C. What was the initial temperature of the hot horseshoe, in degrees Celsius? (Laulima will contain a randomized value within the range shown.) Assume rapid heat transfer within the system, and that the system is fully insulated from its surroundings. Specific heat capacities: 450.J/(kg-K) Cat4186 J/(kg-K) 21. (2 pts.) How much total heat is required to transform (1.00-2.00) liters of liquid water that is initially at 25.0°C entirely into H₂O vapor at 100. C? Convert your final answer to megajoules. (Laulima will contain a randomized value within the range shown.) Assume rapid heat transfer within the system, and that the system is fully insulated from its surroundings. Physical values for H:0, although you may not need to use all of them: Cliquid water 4186 J/(kg-K) L-334,000 J/kg L. -2,256,000 J/kg 22. (2 pts.) How much total heat is needed to fully melt (10.0-20.0; kg of silver, if the silver starts as a 25.0°C solid? Convert your final answer to megajoules. (Laulima will contain a randomized value within the range shown.) Assume rapid heat transfer within the system, and that the system is fully insulated from its surroundings. Physical values for silver. Tach=961°C Cold Ag -230. J/kg-K L-88.0 kJ/kg 23. (1 pt.) A particular sidewalk in a northern city is made up of a series of 1.5-meter-long stone slabs, whose coefficient of thermal expansion is 2.1 x 10 K. If the city's coldest winter temperatures are typically -22°C, and its warmest summer temperatures are typically 34°C, how much does each slab's length change as it undergoes these extremes? Convert your final answer to millimeters.
Answers
16. To find the total energy consumed by the light bulb, we need to calculate the energy using the formula: Energy = Power x Time.
Given:
Power of the light bulb (P) = 75 watts
Time (t) = 45 seconds
Energy = 75 watts x 45 seconds
To convert the energy to kilojoules, we divide the result by 1000:
Energy = (75 watts x 45 seconds) / 1000
17. To determine the dietary Calories of food-energy used by the person, we need to consider the efficiency of the conversion. Given that only a certain percentage (10%-20.3%) of the food-energy is delivered to the light bulb, the remaining energy is expended on biological processes, friction, and other inefficiencies.
Let's assume the conversion efficiency is randomly given within the range of 10%-20.3%. We multiply the total energy consumed by the light bulb by the conversion efficiency to find the dietary Calories used:
Dietary Calories = Energy consumed by the light bulb x Conversion efficiency
18. To calculate the total energy delivered to the food by the blender, we multiply the power of the blender by the time:
Energy = Power x Time
Given:
Power of the blender (P) = 1100 watts
Time (t) = 23 seconds
Energy = 1100 watts x 23 seconds
19. To find the average temperature increase of the food, we need to use the formula: Energy = Mass x Specific heat capacity x Temperature change. We know the energy delivered to the food from the previous question, and we are given the mass of the food and the specific heat capacity randomly within the given ranges. We can rearrange the formula to solve for the temperature change:
Temperature change = Energy / (Mass x Specific heat capacity)
20. To determine the initial temperature of the hot horseshoe, we can use the principle of conservation of energy. The heat lost by the horseshoe is equal to the heat gained by the water and pot. We can calculate the heat lost by the horseshoe using the formula: Heat lost = Mass x Specific heat capacity x Temperature change. We know the final temperature of the system, the mass of the water and pot, and the specific heat capacity of the iron pot. By rearranging the formula, we can solve for the initial temperature of the horseshoe.
21. To calculate the total heat required to transform liquid water into water vapor, we need to consider the heat required for the phase change (latent heat). We know the initial and final temperatures, and assuming the system is fully insulated, we can calculate the heat using the formula: Heat = Mass x Latent heat.
22. To determine the total heat needed to fully melt silver, we need to consider the heat required for the phase change (latent heat). We know the initial temperature, final temperature, mass, and specific heat capacity of silver. Using the formula: Heat = Mass x Latent heat, we can calculate the total heat needed.
23. To calculate the change in length of the stone slab, we can use the formula: Change in length = Coefficient of thermal expansion x Initial length x Temperature change. We are given the coefficient of thermal expansion and the temperature extremes, so we can calculate the change in length by substituting the values into the formula.
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Are circuit breakers wired in parallel or series to the circuit?
Explain why.
(Pls help)
Answers
Answer: Circuit breakers and fuses have different parallel circuits
Explanation: That means that if one circuit gets overloaded (tripping the circuit breaker or blowing the fuse), it won't have any effect on the other circuits.
Answer:heheh it does, number 54
Explanation:
because number 36 Im WOULDNT be right
what is the difference in momentum between a 50.0 kg runner moving at a speed of 3.00 m/s and a 3000 kg truck moving at a speed of only 1.00 m/s?
Answers
Answer:
It would be 2850 kg m/s
Explanation:
What is the power output of a pump which can raise 60kg of water height to height of 10m every minute
Answers
Answer:
Power = Work Done/time=> Power = 60×10×10/60
=> Power = 6000/60
=> Power = 100 Watt
Hence the power output of a pump is 100 Watts.
How is the sun energy important to the earth
Answers
All moving objects don’t have momentum
A. True
B. False
Answers
Answer:
No
Explanation:
Some objects gain momentum.
Answer:
B. False
Hope you could understand.
If you have any query, feel free to ask.