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The internal pressure coefficient on walls for buildings with large permeability is taken as
A marble ball is rolled on a smooth floor of a room to hit a wall. If the time taken by the ball in returning to the point of projection is twice the time taken in reaching the wall, the coefficient of restitution between the ball and the wall, is
The external wind pressure acting on a roof depends on
A ladder is resting against a vertical wall and its bottom is 2.5 m away from the wall. If it slips 0.8 m down the wall, then its bottom will move away from the wall by 1.4 m. What is the length of the ladder?
A glass ball is shot to hit a wall from a point on a smooth floor. If the ball returns back to the point of projection in twice the time taken in reaching the wall, the coefficient of restitution between the glass ball and the wall is
If a ladder touches the roof of a wall and makes an angle of 40° with the 15 metre ling wall , then the length of the ladder is-
Area of openings for buildings of large permeability is more than
Substances which have permeability less than the permeability of free space are known as
In high mountainous region, the type of roof generally recommended for buildings, is
What does the underlined word mean in the following sentence?The old man's house, badly in need of paint, was leaning to one side and had holes in the roof, but one side and had holes in the roof, but