Related Questions

Rotation of the camera at exposure about its vertical axis, is known as
A Swing
B Tilt
C Tip
D None of these
A semicircular disc rests on a horizontal surface with its top flat surface horizontal and circular portion touching down. The coefficient of friction between semi circular disc and horizontal surface is µ. This disc is to be pulled by a horizontal force applied at one edge and it always remains horizontal. When the disc is about to start moving, its top horizontal force will
A Remain horizontal
B Slant up towards direction of pull
C Slant down towards direction of pull
D None of the above
Exposure to mixtures of chemicals are greater than expected on the basis of effects of exposure to each chemical individually. This is known as
A Additives
B Antagonism
C Synergism
D Independent
In order to have a connecting rod equally strong in buckling about X-axis and Y-axis, the moment of inertia about X-axis should be __________ the moment of inertia about Y-axis.
A Equal to
B Twice
C Three times
D Four times
When a cylindrical vessel, containing some liquid, is rotated about its vertical axis, the liquid surface is depressed down at the axis of its rotation and rises up near the walls of the vessel on all sides. This type of flow is known as
A Steady flow
B Turbulent flow
C Vortex flow
D Uniform flow
When a body of mass moment of inertia '$$I$$' (about a given axis) is rotated about that axis with an angular velocity to, then the kinetic energy of rotation is
A $$I\omega $$
B $$I{\omega ^2}$$
C $$0.5I\omega $$
D $$0.5I{\omega ^2}$$
5 m উচ্চতা হতে একটি বলকে 20 m/s বেগে অনুভূমিকের সাথে 30° কোণে উপরের দিকে নিক্ষেপ করা হলো। তাহলে বলটির বিচরণ কাল কত ? (A ball is thrown upward with an angle of 30° with the horizontal line from a height of 5 m with a velocity of 20 m/s. What will be the time of flight of the ball?)
A 10±1989.8s
B 10-1989.8s
C 10+1989.8s
D 10±29.8s
5 m উচ্চতা হতে একটি বলকে 20 m/s বেগে অনুভূমিকের সাথে 30° কোণে উপরের দিকে নিক্ষেপ করা হলো। তাহলে বলটির বিচরণ কাল কত? (A ball is thrown upward with an angle of 30° with the horizontal line from a height of 5 m with a velocity of 20 m/s. What will be the time of flight of the ball?)
A 10±1899.8s
B 10-1989.8s
C 10+1989.8s
D 10±29.8s
The M.I. of hollow circular section about a central axis perpendicular to section as compared to its M.I. about horizontal axis is
A Same
B Double
C Half
D Four times
Khan observes that if flight 409 is cancelled, then the manager could not possible arrive in the time for the meeting . But the flight was not cancelled. Therefore, Khan concludes, the manager will certainly be on time . Halima replies that even if Khan's premises are true, his argument is fallacious. And therefore, she adds, the manager will not arrive on time after all. Which of the following is the strongest thing that we can properly say about this discussion ?
A Halima is mistaken in thinking Khan's argument to be fallacious, and so her own conclusion is unwarranted.
B Halima is right about Khan's argument, but nevertheless her own conclusion is unwarranted
C Since Halima is mistaken about Khan's argument , her own conclusion must be false.
D Halima is right about Khan's argument, but nevertheless her own conclusion is false

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