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A plane glass mirror of thickness 3 cm of material of mu = 3/2 is silvered on the back surface. When a point object is placed 9 cm from surface of the mirror, then the position of the brightest
06
Oct
A plane glass mirror of thickness 3 cm of material of mu = 3/2 is silvered on the back surface. When a point object is placed 9 cm from surface of the mirror, then the position of the brightest A plane glass mirror of thickness 3 cm of material of mu = 3/2 is silvered [...]
The radii of the ends of frustum of a cone 45 cm high are 28 cm and 7 cm. Find its volume, the curved surface area and the total surface area.
06
Oct
The radii of the ends of frustum of a cone 45 cm high are 28 cm and 7 cm. Find its volume, the curved surface area and the total surface area. the curved surface area and the total surface area. The radii of the ends of frustum of a cone 45 cm high are 28 [...]
A concave mirror is placed on a horizontal table with its axis directed vertically upward. Let O be the pole of the mirror C its centre of curvature and F is the focus. A point object is placed at C.
06
Oct
A concave mirror is placed on a horizontal table with its axis directed vertically upward. Let O be the pole of the mirror C its centre of curvature and F is the focus. A point object is placed at C. A concave mirror is placed on a horizontal table with its axis directed vertically upward. [...]
A hemispherical tank full of water is emptied by a pipe at the rate of 3 7/4 litres per second . How much time will it take to half empty the tank, if the tank is 3 metres in diameter? (Take π = 22/7)
06
Oct
A hemispherical tank full of water is emptied by a pipe at the rate of 3 7/4 litres per second . How much time will it take to half empty the tank, if the tank is 3 metres in diameter? (Take π = 22/7) A hemispherical tank full of water is emptied by a pipe [...]
The critical angle for light going from medium X into medium Y is theta. The speed of light in medium X is v. The speed of light in medium Y is
06
Oct
The critical angle for light going from medium X into medium Y is theta. The speed of light in medium X is v. The speed of light in medium Y is The critical angle for light going from medium X into medium Y is theta. The speed of light in medium X is v. The [...]
For a prism kept in air, it is found that for an angle of incidence 60, the angle of refraction A, angle of deviation delta and angle of emergence e become equal. Then, the refractive index
06
Oct
For a prism kept in air, it is found that for an angle of incidence 60, the angle of refraction A, angle of deviation delta and angle of emergence e become equal. Then, the refractive index angle of deviation delta and angle of emergence e become equal. Then For a prism kept in air it [...]
A copper rod of diameter 1 cm and length 8 cm is drawn into a wire of length 18 m of uniform thickness. Find the thickness of the wire.
06
Oct
A copper rod of diameter 1 cm and length 8 cm is drawn into a wire of length 18 m of uniform thickness. Find the thickness of the wire. A copper rod of diameter 1 cm and length 8 cm is drawn into a wire of length 18 m of uniform thickness. Find the thickness [...]
Let r and r’ denote the angles inside an equilateral prism, as usual, in degrees. Consider that during some time interval from t = 0 to t = t, r’ varies with time as r’ = 10 + t^2.
06
Oct
Let r and r’ denote the angles inside an equilateral prism, as usual, in degrees. Consider that during some time interval from t = 0 to t = t, r’ varies with time as r’ = 10 + t^2. as usual in degrees. Consider that during some time interval from t = 0 to t [...]
Selvi’s house has an overhead tank in the shape of a cylinder. This is filled by pumping water from a sump (underground tank). Which is in the shape of a cuboid. The sump has dimensions 1.57m×1.44m×0.95m. The overhead tank has its radius of 60cm and its height is 95cm. Find the height of the water, left in the sump after the overhead tank has been completely filled with water from a sump which had been full. Compare the capacity of the tank with that of the sump (Use π=22/7)
06
Oct
Selvi’s house has an overhead tank in the shape of a cylinder. This is filled by pumping water from a sump (underground tank). Which is in the shape of a cuboid. The sump has dimensions 1.57m×1.44m×0.95m. The overhead tank has its radius of 60cm and its height is 95cm. Find the height of the water, [...]
A cone of height 24cm and radius of base 6cm is made up modelling clay. A child reshapes it in the form of sphere. Find the radius of the sphere.
06
Oct
A cone of height 24cm and radius of base 6cm is made up modelling clay. A child reshapes it in the form of sphere. Find the radius of the sphere. A cone of height 24cm and radius of base 6cm is made up modelling clay. A child reshapes it in the form of sphere. Find [...]