Answer:
Explanation:
Given: Pressure of a fluid column ΔP=ρgΔh
Density of water (ρ) = 1000 kg/m^3
Acceleration of gravity (g) = 9.8 m/sec^2
Δh = difference in height / elevation of water tower and tap
= 50 - 10
= 40
Substitute back into equation:
Pressure = 1000*9.8*40
= 392000 N/m^2
The answer is D.
Answer:
Explanation:
Pressure of a fluid column ΔP=ρgΔh
delta h = 50-10 = 40
P = 1000x9.8x40
= 392000
ans is D
which of the following people is required by law to wear a seatbelt
Answer:
Car drivers and front seat passengers must wear a seat belt, unless they have a medical exemption certificate. Adults travelling in the rear of a car must also use seatbelts, if they're fitted. It's the responsibility of the adult passenger (not the driver) to make sure that they are using the seatbelt.
for arwa and yeahahhahahhhhhhhhhhhhh
Ekkkkk, hello q(≧▽≦q)
Find the surface area of the gulf box Square centimeters
Answer:
A = 600 cm²
Explanation:
The surface area of a cuboid is given by :
A = 2(lb+bh+hl)
Here, l = b c = 10 cm
Put all the values,
A = 2[10(10)+10(10)+10(10)]
= 2(100+100+100)
= 2(300)
= 600 cm²
So, the surface area of the box is equal to 600 cm².
When you select multiple edges to Chamfer, a flag is
displayed on each edge and each one can be given individual
Chamfer dimensions.
Select Answer
FALSE
TRUE
what is the fastest motorcycle in the world ?
What's the best way to get rid of an extremely puffed up battery?
Answer:
If it is rechargable, there should be instructions on it, but I believe you can recycle it. For single use batteries, they need to be put into a safe location as they can actually explode sometimes, and acid leaks can also occur.
Normally, you can use put something like electrical tape or a nonconductive material on top of both of the battery nodes and you can just toss it into a trash can.
Explanation:
I need to find the answer for this question this is hard and I can’t find it
how does a supercharger work?
Answer:
Supercharger works through a pair of rotors that blow air at a high speed into the intake port. As the port then contains a greater quantity of air, it becomes compressed. This enables a higher quantity of fuel to be injected into the combustion chamber, thus generating higher power.
Explanation:
HOPE THIS HELPS :)
A lightbulb has a fixed negative and positive connector. You cannot swap positive and negative sides of a lightbulb in a circuit. true or false
Which language would be most useful to learn for someone interested in studying environmental engineering with an emphasis on the effects of deforestation, such as soil erosion?
Arabic
Chinese
French
German
Answer:
Chinese or French .... l think
How does Hydro Technology and Hydro Energy Help with Global Water Issues?
Could someone please help me asap
how many seconds will it take to cross the street at a normal walking pace?
the 6 penalties for driving under influence
Use the graph to determine which statement is true about the end behavior of f(x).
Answer:
As the x-values go to negative infinity, the function’s values go to positive infinity.
Explanation:
if the ans choices are:
As the x-values go to negative infinity, the function’s values go to negative infinity.
As the x-values go to negative infinity, the function’s values go to positive infinity.
As the x-values go to positive infinity, the function’s values go to negative infinity.
As the x-values go to positive infinity, the function’s values go to zero.
the ans is the 2nd choice
Answer:
It's B: As the x-values go to negative infinity, the function’s values go to positive infinity.
Match the scenario to the related government program.
1. Newlyweds buy an energy-efficient dishwasher for their new home.
2. An engineering team retrofits a manufacturing plant with a new heating system that is 20% more effective than the old one.
3. A team designs an arid-zone shade structure from political campaign signs.
lifecycle building challenge
energy star program
better buildings initiative
Answer:
3. A team designs an arid-zone shade structure from political campaign sign
Plants convert ___________ energy from the sun to __________energy (photosynthesis)
Answer:
Plants convert _____Light______ energy from the sun to _____Chemical _____energy (photosynthesis)
Explanation:
Do u want an explanation?
Which phase of project development provides engineers with an opportunity to determine the gaps or problems of the project on paper?
design
testing
requirements gathering
implementation: develop and build
N
Select the correct answer.
Which of these situations can be solved by an expert system?
A. predicting election results based on all previous election voting trends
B. deciding the sentence in criminal cases
C. predicting the winner of a baseball game based on the statistics of one team
OD.
updating its knowledge base to remove incorrect data
Answer:
A because i know thats it
What do the cells and tissues of the endocrine system release to help maintain homeostasis in the body?
The cells and tissue of the endocrine system release hormones to help maintain homeostasis in the body.
What is the endocrine system?The complex network of glands and organs that makes up the endocrine system secretes hormones—chemical messengers—directly into the bloodstream. The hormones then travel through the bloodstream to their target cells, where they must act.
The hormone-producing glands may or may not be nearby the target cells. The nervous system and endocrine system collaborate to start or stop movement and physiological function.
A body's homeostasis is maintained by a negative feedback mechanism (activation of one component does not activate the other). All body systems must be in a condition of balance for the body to survive and work properly.
Therefore, to support the body's homeostasis, the cells, and tissues of the endocrine system release hormones.
To learn more about the endocrine system, refer to the link:
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How has technology affected the economy? Check all that apply.
Robots have taken over some jobs in factories.
Fewer employees are able to do their jobs from home.
Automation has had less of an impact in manufacturing.
The pharmaceutical industry has improved the economy.
Consumers can buy goods and services on the Internet.
Competition between companies has led to new products.
Answer:
Consumers can buy goods and services on the internet.
Competition between companies has led to new products.
Explanation:
Answer:
(E) (F) aka
Explanation:
got it right on edge
She spent her time reading stories about people who fought in the Revolution.
Can somebody help me
Engineer recognize the danger of not wearing the seat belt and decided to put pressure on the government to enact laws mandating their use is explaining how the government regulations guided the development of the seat belt technology. Hence, option D is correct.
What is seat belt technology?Active seatbelt systems have a motor that, in dangerous situations, pulls the seat belt webbing out of the way before a collision occurs. Data from active safety systems, such as the Electronic Stability Control or Brake Assist systems, can be used to activate an active seat belt.
A seatbelt is made up of a retractor and a belt made of flexible webbing. The retractor is composed of a spool around which the belt winds and a spring attached to the spool to maintain the webbing taut. It is often housed in a plastic box over the passenger's outer shoulder.
Lap belts, sash belts, automated seat belts, three-point belts, belt-in-seat (BIS), five-point harnesses, and six-point harnesses are a few of the most popular styles of seat belts.
Thus, option D is correct.
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Are all types of respirators the same?
Which of the following technologies will the design and development of a bicycle stand be categorized under?
(A) Building technology
(B) Electrical technology
(C) Electronic technology
(D) Mechanical technology
Answer:
when you're going to need a designer a builder an electrical builder and a mechanic and you're going to need to be careful with what you use for all those things but the bike need to build you'll need a structure
Answer:
Building technology
Explanation:
explain how a roller coaster functions using gravity and momentum. Why does it not need an engine or a motor to speed it up and slow it down?
Answer:
A roller coaster does not have an engine to generate energy. This builds up a supply of potential energy that will be used to go down the hill as the train is pulled by gravity. Then all of that stored energy is released as kinetic energy which is what will get the train to go up the next hill.
Explanation:
A simple non-ideal Rankine cycle with water as the working fluid operates between the pressure limits of 15 MPa in the boiler and 125 kPa in the condenser. Saturated steam enters the turbine. Irreversibilities in the turbine cause the steam quality at the outlet of the turbine to be 70 percent. Determine the isentropic efficiency of the turbine and the thermal efficiency of the cycle. Use steam tables. The isentropic efficiency of the turbine is %. The thermal efficiency of the cycle is
Answer:
The right solution is "28.45%".
Explanation:
The given values are:
[tex]P_4=50\ kPa[/tex]
[tex]h_4=0.7(2304.7)+340.5[/tex]
[tex]=1953.83 \ KJ/Kg[/tex]
and,
[tex]P_3=15 \ mPa[/tex]
[tex]h_3=hg[/tex]
[tex]=2610.8 \ KJ/Kg[/tex]
[tex]s_3=sg[/tex]
[tex]=5.3108 \ KJ/Kgh[/tex]
At 45,
⇒ [tex]x_{45} = \frac{5.3108-1.0912}{6.5019}[/tex]
[tex]=0.66[/tex]
At [tex]P_4=50 \ Kpa[/tex],
[tex]h_f=340.54[/tex]
or,
[tex]V_f=0.001030 \ m^3/Kg[/tex]
then,
⇒ [tex]h_2=340.54+0.001030(15\times 10^{3}-50)[/tex]
[tex]=355.94 \ kJ/kg[/tex]
hence,
The isentropic efficiency of turbine will be:
⇒ [tex]n_T=\frac{h_3-h_4}{h_3-h_{45}}[/tex]
[tex]=\frac{2610.8-1953.83}{2610.8-1836.26}[/tex]
[tex]=84.818[/tex] (%)
The thermal efficiency of cycle will be:
⇒ [tex]n_C=\frac{W_T-W_P}{2_{in}}[/tex]
[tex]=\frac{(2610.8-1953-83)-(355.93-340.54)}{2610.8-355.93}[/tex]
[tex]=28.45[/tex] (%)
The isentropic efficiency of the turbine is; η_t = 76.35%
The thermal efficiency of the cycle is; η_th = 27.08%
We are given;
P₃ = 15 mPa
P₄ = 125 kPa
At P₃ = 15 mPa = 15000 kPa, from the first table attached, we have;
Enthalpy of saturation vapour; h_g = h₃ = 2610.8 kJ/kg
Entropy of saturation vapour; s_g = s₃ = 5.3108 kJ/kg.k
Similarly, At P₄ = 125 kPa, from the second table attached, we have;
Enthalpy of evaporation; h_fg = 2240.6 kJ/kg
Enthalpy of saturation; h_f = 444.36 kJ/kg
Entropy of saturation; s_f = s₄ = 1.3741
Specific volume; v_f = 0.001048 m³/kg
Since the the steam quality at the outlet of the turbine to be 70 percent, then;
h₄ = 0.7h_fg + h_f
h₄ = 0.7(2240.6) + 444.36
h₄ = 2012.78 kJ/kg
Formula for the quality of the steam is;
x,₄₋₅ = (s₃ - s₄)/(s₃ + s₄)
x,₄₋₅ = (5.3108 - 1.3741)/(5.3108 + 1.3741)
x,₄₋₅ = 0.5889
Formula for h₂ is;
h₂ = h_f + V_f(P₃ - P₄)
h₂ = 444.36 + 0.001048(15000 - 125)
h₂ = 459.959 kJ/kg
Formula for Isentropic efficiency is;
η_t = (2610.8 - 2012.78)/(2610.8 - (0.7*2610.8))
η_t = 0.7635
η_t = 76.35%
Formula for thermal efficiency here is;
η_th = [(h₃ - h₄) - (h₂ - h_f)]/(h₃ - h₂)
η_th = [(2610.8 - 2012.78) - (459.959 - 444.36)]/(2610.8 - 459.959)
η_th = 0.2708
η_th = 27.08%
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