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Which type of perceptual constancy allows us to recognize an object as having the same shape despite changes in the angle of viewing?

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Important Questions on Trigonometric Functions

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The thermal dissociation equilibrium of CaCO3s⁡ is studied under different conditions.

CaCO3s⁡⇌CaOs⁡+CO2g

For this equilibrium, the correct statement(s) is/are
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Mathematics>Trigonometry>Trigonometric Functions>Angles
Consider a triangular plot ABC with sides AB=7 m, BC=5 m and CA=6 m. A vertical lamp-post at the mid-point D of AC subtends an angle 30° at B. The height (in m) of the lamp-post is:
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Mathematics>Trigonometry>Trigonometric Functions>Angles
A bird is sitting on the top of a vertical pole 20 m high and its elevation from a point O on the ground is 45°. It flies off horizontally straight away from the point O. After one second, the elevation of the bird from O is reduced to 30°. Then the speed (in m/s) of the bird is 
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Mathematics>Trigonometry>Trigonometric Functions>Angles
In the following structure, the double bonds are marked as I, II, III and IV. 

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 Geometrical isomerism is not possible at the site(s):
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Mathematics>Trigonometry>Trigonometric Functions>Angles
If the angle of elevation of a cloud from a point P which is 25m above a lake be 30° and the angle of depression of reflection of the could in the lake from P be 60°, then the height of the cloud (in meters) from the surface of the lake is :
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Mathematics>Trigonometry>Trigonometric Functions>Angles
State Henry's law.
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Mathematics>Trigonometry>Trigonometric Functions>Angles
Give one example for the given equilibrium : Liquid-Gas Equilibrium.
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Mathematics>Trigonometry>Trigonometric Functions>Angles
If pressure is applied to the equilibrium of  solid⇌liquid. The melting point of the solid
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Mathematics>Trigonometry>Trigonometric Functions>Angles
Give one example for the given equilibrium: Solid-Solution Equilibrium.
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Mathematics>Trigonometry>Trigonometric Functions>Angles
Under what condition the given equilibria can exist? Solid-Liquid equilibrium
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Mathematics>Trigonometry>Trigonometric Functions>Angles
Lines l and n intersect at the point O. The value of x, y, and z if a=70° is:
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Mathematics>Trigonometry>Trigonometric Functions>Angles
Sea divers use mixture of
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Mathematics>Trigonometry>Trigonometric Functions>Angles
If the pressure is applied to the following equilibrium of liquid⇌vapour, the boiling point of the liquid
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Mathematics>Trigonometry>Trigonometric Functions>Angles
Under what condition the given equilibria can exist? Gas-solution equilibrium.
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Mathematics>Trigonometry>Trigonometric Functions>Angles
Which of the following is not a physical equilibrium?
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Mathematics>Trigonometry>Trigonometric Functions>Angles
Give one example for the given equilibria: Solid-Liquid Equilibria.
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Mathematics>Trigonometry>Trigonometric Functions>Angles
Define Henry Law. Why the gas fizzes out when a soda water bottle is opened ?
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Mathematics>Trigonometry>Trigonometric Functions>Angles
A liquid is kept in a closed vessel. If a glass plate of negligible mass with small hole is kept on top of the liquid surface, then vapour pressure of the liquid in the vessel is -
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Mathematics>Trigonometry>Trigonometric Functions>Angles
Define the terms vapour pressure and solubility.
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Mathematics>Trigonometry>Trigonometric Functions>Angles
Under what condition the given equilibria can exist? Liquid-gas equilibrium.