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3 years ago

How do you distinguish the difference between drag and lift forces?

Engineering

1 answer:

kumpel [21]3 years ago

6 0

Answer Explanation :

LIFT FORCE:

Lift force is that force which acts right angles to the direction of motion
Lift forces is produced through air
Lift forces is created by difference in air pressure
force on wings of bird is an example of lift force

DRAG FORCE:

Drag force is that force which act opposite to the direction of motion
Drag is caused by friction and differences in air pressure
Skydiving is an example of drag force

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jeyben [28]

Answer:

right answer is option no d

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3 years ago

The intake and exhaust processes are not considered in the p-V diagram of Otto cycle. a) true b) false

vovangra [49]

Answer:

b) false

Explanation:

We know that Otto cycle is the ideal cycle for all petrol working engine.In Otto cycle all process are consider is ideal ,means there is no any ir-reversibility in the processes.

It consist four processes

1-2:Reversible adiabatic compression

2-3:Constant volume heat addition

3-4:Reversible adiabatic expansion

3-4:Constant volume heat rejection

Along with above 4 processes intake and exhaust processes are parallel to each other.From the P-v diagram we can see that all processes.

But actually in general we are not showing intake and exhaust line then it did not mean that in Otto cycle did not have intake and exhaust processes.

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3 years ago

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marishachu [46]

Answer:

hope this helps

Explanation:

answers:

1. Chemical engineering is most difficult because it's a mix of physics, chemistry and math

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4. i have no idea sorry :(

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3 years ago

Read 2 more answers

Determine the nature of the following cycle (reversible, irreversible, or impossible): a refrigeration cycle draws heat from a c

vlabodo [156]

Answer:

Impossible.

Explanation:

The ideal Coefficient of Performance is:

$COP_{i} = \frac{250\,K}{300\,K-250\,K}$

$COP_{i} = 5$

The real Coefficient of Performance is:

$COP_{r} = \frac{950\,kJ-70\,kJ}{70\,kJ}$

$COP_{r} = 12.571$

Which leads to an absurds, since the real Coefficient of Performance must be equal to or lesser than ideal Coefficient of Performance. Then, the cycle is impossible, since it violates the Second Law of Thermodynamics.

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3 years ago

An aircraft increases its speed by 2% in straight and level flight. If the total lift remains constant determine the revised CL

damaskus [11]

Answer:

96.1%

Explanation:

We know that lift force

$F_L=\dfrac{1}{2}C_L\rho AV^2$