Objective question related to aerodynamics

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Discussion Overview

The discussion revolves around two questions related to aerodynamics: one concerning the conditions for maximum range of a glider and the other about the definition of total pressure at a point in a fluid flow. The scope includes conceptual understanding and application of aerodynamic principles, as well as homework-related inquiry.

Discussion Character

  • Homework-related
  • Conceptual clarification

Main Points Raised

  • One participant presents two multiple-choice questions regarding glider aerodynamics and total pressure definitions.
  • Another participant requests the original poster to share their thoughts and relevant equations to facilitate tutorial help.
  • A participant notes that total pressure is equal to dynamic pressure plus static pressure and discusses the implications of bringing flow to rest, questioning how this relates to thermodynamic processes.
  • The same participant speculates that the isobaric process might be the correct answer for the total pressure question, expressing uncertainty about the relationship between pressure and thermodynamic processes.

Areas of Agreement / Disagreement

The discussion remains unresolved, with multiple participants seeking clarification and expressing uncertainty about the questions posed. There is no consensus on the answers to the questions.

Contextual Notes

Participants have not provided specific equations or detailed concepts related to the questions, which may limit the depth of the discussion. The relationship between dynamic and static pressure in various thermodynamic processes is also not fully explored.

bourne
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question) For maximum range of of a glider, which of the following is true?
a) lift to drag ratio is maximum
b) rate of descent is minimum
c)descent angle is maximum
d) lift to weight ratio is maximum

question) Total pressure at a point is defined as the pressure when the flow is brought to rest
a) adiabatically
b) isentropically
c) isothermally
d) isobarically
 
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Since this is obviously a homework problem, do you want to present your thoughts on the questions?
 
Welcome to the PF, bourne. I've moved your thread to one of the Homework Help forums.

Please tell us what the relevant equations and concepts are, and what your initial thoughts are on these questions. Then we will be able to offer tutorial help.
 
berkeman said:
Welcome to the PF, bourne. I've moved your thread to one of the Homework Help forums.

Please tell us what the relevant equations and concepts are, and what your initial thoughts are on these questions. Then we will be able to offer tutorial help.

well m not given any hints . my professor just asked me these questions outright.
 
bourne said:
well m not given any hints . my professor just asked me these questions outright.

and presented you with letter bulleted multiple choice multiple choices? even if he did no one is going to tell outright
 
berkeman said:
Welcome to the PF, bourne. I've moved your thread to one of the Homework Help forums.

Please tell us what the relevant equations and concepts are, and what your initial thoughts are on these questions. Then we will be able to offer tutorial help.

the total pressure is eqal to dynamic pressure plus the static pressure. but when a flow is brought to rest, the dynamic pressure becomes zero. the only pressure left is static pressure.when the flow is at rest the pressure at a point is same in all directions.But i dunt know how to coordinate this concept with the thermodynamic processes. In these thermodynamic processes like isothermal, adiabatic, isentropic pressure is never constant. So my guess is isobaric process. m i correct? Can you please tell me what exactly is happening?
 
ice109 said:
and presented you with letter bulleted multiple choice multiple choices? even if he did no one is going to tell outright

it was kindda surprise test. well i have presented my thoughts. Can you please correct me?
 

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