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The total drag is a sum of the skin drag and the pressure drag. Which among of the following options, states the correct formula for skin drag and pressure drag? (Here µ stands for dynamic viscosity of fluid, D stands for diameter of the sphere and U stands for velocity of flow of fluid.)
Surface friction drag corresponds to 35% of the lift independent drag whereas the profile drag leads to 65% of the lift independent drag.
Consider the following statements about folds: An anticline is a fold that is convex upward, and a syncline is a fold that is concave upward. An anticlinorium is a large syncline on which minor folds are superimposed, and a synclinorium is a large anticline on which minor folds are superimposed. Which of the above statements is correct?
Which of the following can be one of the steps in stacking?
1. Divide the training data into k folds
2. Train k models on each k-1 folds and get the out of fold predictions for remaining one fold
3. Divide the test data set in "k" folds and get individual fold predictions by different algorithms
n the following passage, some of the words have been left out. Read the passage carefully and select the correct answer for the given blank out of thefour alternatives. The rising sun has great inner ______. Not just to ______ the new morning right after the dark night, but also the new rhythms and vibrations within existence. Theentire universe – including the trees, birds and flowers – wake up to the rising sun. When we listen to the birds chirping and see the flower petals open, rememberthat the sunrise is not just a great happening on the outside. If we are alert and aware, then the sunrise is also happening deep within us. Something within ourselvesis also ______ with the first rays of the sun. We just need to be sensitive and available; we just need to be ______. Like the outside world, we need to open the inner doorto let the new dawn enter within. Just open the window of our inner world and allow the beautiful experience of sunrise to ______ within ourselves – this experience isbeyond anything earthly. sunrise to ______ within ourselves
Which of the following gives a better approximate distribution of drag over thin airfoils? The given percentages are for skin- friction drag and pressure drag respectively.
An aircraft with elliptic wing planform has parasite drag coefficient as 0.6. Lift coefficient of wing is 0.25 and aspect ratio is 7.5. If induced drag co-efficient is 0.0235 then, find total drag coefficient for the wing.
For a symmetrical airfoil drag coefficient at zero lift is 0.05 and induced drag coefficient is 0.0025. Find the total drag coefficient.
We can design our aircraft to cruise for 3 different lift to drag ratio. Lift to drag ratio are as follows: 10, 12 and 11.25. Now, if we want to reduce thrust required to fly then, at which value of lift to drag ratio our aircraft needs to be designed so that it can operate with minimum thrust required?
If my glider has lift coefficient at maximum lift to drag as 1.5 and induced drag factor K is 0.007 then, find parasite drag coefficient.