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
pantera1 [17]
3 years ago
12

Marcelo es muy bueno resolviendo adivinanzas y acertijos. Por eso, estaba totalmente disgustado cuando se dio cuenta de que no e

ra capaz de resolver un acertijo muy conocido y que no es tan difícil de resolver.
Pero no se dejó vencer: se dirigió a una pizarra cercana y realizó el diagrama de la imagen adjunta (ver imagen).
Cuando terminó, dio un paso para atrás y dijo: “Bueno, ahora la solución es realmente obvia”. Y realmente lo era. La pregunta para ti es: ¿De qué acertijo se trata?

Engineering
1 answer:
makvit [3.9K]3 years ago
6 0
English please I can’t understand
You might be interested in
Which of the followong parts does not rotate during starter operation? A. Commutator segments B. Armature windings c. Field wind
photoshop1234 [79]

Answer: B

Explanation: unless newer models added wingding to code inside fused computer...wingdings on a window ...not a motor

8 0
3 years ago
Steam at 4 MPa and 350°C is expanded in an adiabatic turbine to 125kPa. What is the isentropic efficiency (percent) of this turb
guajiro [1.7K]

Answer:

\eta_{turbine} = 0.603 = 60.3\%

Explanation:

First, we will find actual properties at given inlet and outlet states by the use of steam tables:

AT INLET:

At 4MPa and 350°C, from the superheated table:

h₁ = 3093.3 KJ/kg

s₁ = 6.5843 KJ/kg.K

AT OUTLET:

At P₂ = 125 KPa and steam is saturated in  vapor state:

h₂ = h_{g\ at\ 125KPa} = 2684.9 KJ/kg

Now, for the isentropic enthalpy, we have:

P₂ = 125 KPa and s₂ = s₁ = 6.5843 KJ/kg.K

Since s₂ is less than s_g and greater than s_f at 125 KPa. Therefore, the steam is in a saturated mixture state. So:

x = \frac{s_2-s_f}{s_{fg}} \\\\x = \frac{6.5843\ KJ/kg.K - 1.3741\ KJ/kg.K}{5.91\ KJ/kg.K}\\\\x = 0.88

Now, we will find h_{2s}(enthalpy at the outlet for the isentropic process):

h_{2s} = h_{f\ at\ 125KPa}+xh_{fg\ at\ 125KPa}\\\\h_{2s} = 444.36\ KJ/kg + (0.88)(2240.6\ KJ/kg)\\h_{2s} = 2416.088\ KJ/kg

Now, the isentropic efficiency of the turbine can be given as follows:

\eta_{turbine} = \frac{h_1-h_2}{h_1-h_{2s}}\\\\\eta_{turbine} = \frac{3093.3\ KJ/kg-2684.9\ KJ/kg}{3093.3\ KJ/kg-2416.088\ KJ/kg}\\\\\eta_{turbine} = \frac{408.4\ KJ/kg}{677.212\ KJ/kg}\\\\\eta_{turbine} = 0.603 = 60.3\%

3 0
3 years ago
A 3-m-high, 11-m-wide rectangular gate is hinged at the top edge at A and is restrained by a fixed ridge at B. Determine the hyd
serg [7]

Answer:

its a

Explanation:

its a

5 0
3 years ago
Construction support involves mostly what kind of work?
Paraphin [41]

Answer:

Outdoors

Explanation:

Construction workers perform outdoors.

6 0
2 years ago
Two technicians are discussing cylinder honing technician a says a good cross hatch helps to trap the oil and retain it in the c
aleksley [76]

er:

Explanation:Technician A says that primary vibration is created by slight differences in the inertia of the pistons between top dead center and bottom dead center. Technician B says that secondary vibration is a strong low-frequency vibration caused by the movement of the piston traveling up and down the cylinder. Who is correct? O A. Neither Technician A nor B OB. Technician B O C. Both Technicians A and B D. Technician A​

8 0
3 years ago
Other questions:
  • Explain what entropy is in relation to the second law of thermodynamics?
    9·1 answer
  • A piston/cylinder contains 1.5 kg of water at 200 kPa, 150°C. It is now heated by a process in which pressure is linearly relate
    14·1 answer
  • 2 Consider airflow over a plate surface maintained at a temperature of 220°C. The temperature profile of the airflow is given as
    13·1 answer
  • A drainage ditch alongside a highway with a 3% grade has a rectangular cross-section of depth 4 ft and width 8 ft, and is fully
    12·1 answer
  • Whats the best used for Arch bridge
    11·1 answer
  • NASA’s Ames research center in Mountain View, California has a centrifuge built to simulate high-g environments. It spins horizo
    15·1 answer
  • If you are a subcontractor in the leather and apparel industry, you might make any of the following items EXCEPT which
    7·1 answer
  • Technician A says that the enable criteria are the criteria that must be met before the PCM completes a monitor test. Technician
    8·1 answer
  • Question Completion Status:
    6·1 answer
  • The team needs to choose a primary view for the part drawing. Three team members make suggestions:
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!