1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Zolol [24]
4 years ago
15

A mechanical system comprises three subsystems in series with reliabilities of 98%, 92%, and 87%. What is the overall reliabilit

y of the system?
Engineering
1 answer:
eduard4 years ago
7 0

Answer:

The overall reliability of the system is found to be 0.784 or 78.4%.

Explanation:

Since, the system has three subsystems in series with following reliabilities:

Reliability of 1st system = R1 = 98% = 0.98

Reliability of 2nd system = R2 = 92% = 0.92

Reliability of 3rd system = R3 = 87% = 0.87

Thus, the overall reliability for series configuration is given by the following formula:

Overall Reliability = (Reliability of 1st system) (Reliability of 2nd System) (Reliability of 3rd System)

Overall Reliability = (0.98)(0.92)(0.87)

Overall Reliability = 0.784

<u>Overall Reliability =  78.4%</u>

You might be interested in
slader A heat pump cycle is used to maintain the interior of a building at 15°C. At steady state, the heat pump receives energy
nikklg [1K]

Answer:

a. 33120MJ

b. 5.6

c. 48

Explanation:

∆U= 120,000 KJ/h

Since

1 day =  24 hrs

14 days =24 x  14 hrs

14 days = 336 hrs

∆U = 120000 x 336 KJ

=40320000KJ

K = 1000

M = 1000000

∆U = 403200 MJ

Work done

W= 2000 KW.h    ( 1 h = 3600 s)

W= 7200 MJ

According to the first law of thermodynamics

∆U = Q+W

Q= 40320 - 7200 MJ

1)Qa=33120 MJ

Coefficient of performance

COP = ∆U/W

COP= 40320 / 7200

2)COP = 5.6

3)COP of ideal heat pump

Th/(Th - Tl)

Th = 15°C

Tl = 9°C

Convert Celsius to Kelvin

273 + 15 = 288

288/(15-9)

288/6

48

COP= 48

7 0
3 years ago
Read 2 more answers
He is going ___ in the hot air ballon​
Vladimir [108]

no artical shoul be used here

5 0
3 years ago
What type of screwdriver requires the use of a hammer or mallet?​
masya89 [10]

Answer:

Slot screw driver can be used that way but I wouldn't recommend it

5 0
3 years ago
A Carnot refrigeration cycle absorbs heat at -12 °C and rejects it at 40 °C. a)-Calculate the coefficient of performance of this
tresset_1 [31]

Answer:

a)COP=5.01

b)W_{in}=2.998 KW

c)COP=6.01

d)Q_R=17.99 KW

Explanation:

Given

T_L= -12°C,T_H=40°C

For refrigeration

  We know that Carnot cycle is an ideal cycle that have all reversible process.

So COP of refrigeration is given as follows

COP=\dfrac{T_L}{T_H-T_L}  ,T in Kelvin.

COP=\dfrac{261}{313-261}

a)COP=5.01

Given that refrigeration effect= 15 KW

We know that  COP=\dfrac{RE}{W_{in}}

RE is the refrigeration effect

So

5.01=\dfrac{15}{W_{in}}

b)W_{in}=2.998 KW

For heat pump

So COP of heat pump is given as follows

COP=\dfrac{T_h}{T_H-T_L}  ,T in Kelvin.

COP=\dfrac{313}{313-261}

c)COP=6.01

In heat pump

Heat rejection at high temperature=heat absorb at  low temperature+work in put

Q_R=Q_A+W_{in}

Given that Q_A=15KW

We know that  COP=\dfrac{Q_R}{W_{in}}

COP=\dfrac{Q_R}{Q_R-Q_A}

6.01=\dfrac{Q_R}{Q_R-15}

d)Q_R=17.99 KW

5 0
4 years ago
Uses of P-N junction
Lubov Fominskaja [6]

Answer:

Explanation:

Two that come to mind:

  1. a semiconductor diode is essentially a PN junction
  2. a transistor is made of two pn junctions.
4 0
3 years ago
Other questions:
  • What are the three main areas of bioengineering?
    11·1 answer
  • Air at 293k and 1atm flow over a flat plate at 5m/s. The plate is 5m wide and 6m long. (a) Determine the boundary layer thicknes
    14·1 answer
  • A 1200-W iron is left on the iron board with its base exposed to ambient air at 26°C. The base plate of the iron has a thickness
    10·1 answer
  • 250 hp, 230 V, and speed of 435 r/min DC shunt motor has a nominal full load current 862 A. a. Calculate the total losses and ef
    11·1 answer
  • Around the 1760s what allowed for more supplies to be moved around?
    13·1 answer
  • I really need a good grade please help
    13·1 answer
  • While discussing diagnostic procedures: Technician A says that after the visual inspection has been performed, the DTCs should b
    14·1 answer
  • 2. How many amperes of current will flow through a circuit that has 3 ohms of resistance if
    5·1 answer
  • Technician A says that a tie rod end is a ball and socket joint similar in construction to a ball joint. Technician B says that
    6·2 answers
  • Ow is squeezing toothpaste out of a tube of toothpaste similar to peristalsis?
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!