Physics Doubt

We will have general discussion of all physics doubts here.

physics

by souryadeep deb -

Air is streaming past a horizontal air plane wing such that its speed is  over the upper surface and  at the lower surface. If the density of air is , what will be the gross life on the wing? If the wing is  long and has an average width of 2 m,

Select one:
81.9 N
8.19 kN
819 kN
81.9 kN 

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physics

by souryadeep deb -


A small iron sphere is dropped from a great height. It attains its terminal velocity after having fallen 32 m. Then, it covers the rest of the path with terminal velocity only. The work done by air friction during the first 32 m of fall is . The work done by air friction during the subsequent 32 m fall is. Then

Select one:
 

physics

by souryadeep deb -

A liquid does not wet the sides of a solid, if the angle of contact Select one:

acute 
Zero
Obtuse

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The liquid which do not wet the solid have obtuse angle of contact. For mercury and glass, the angle of contact is .

The correct answer is: Obtuse

Physics

by Utkal Raja -

Sir my problem is 

If two equal and opposite charges placed at a distance  2m apart then where should be the third charge placed so that three charges stay equilibrium. Plz sir tell

physics doubt

by Saurabh yadav -
in a cyclotron, charge moves from one dee to another but both dees being metallic have no electric field in them. Since charge is moved by electric field but if the electric field is present it might enter the dee and thus it would contradict the statement.

Please resolve my query.
So how does charge move
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Physics

by Md Mutahhir Azam -

Light Reflection and Refraction

How to find the graph of variation of v (image distance) with u (object distance) where symbols have their usual meanings ?