The outer surface of a hollow sphere of aluminium

Asked by admin @ 16/08/2021 in CBSE BOARD X viewed by 295 People

The outer surface of a hollow sphere of aluminium of radius 50 cm is to be used as a mirror. What will be the focal length of this mirror? Which type of spherical mirror will it provide?

Answered by admin @ 16/08/2021

The focal length of the mirror will be 50/2 = 25 cm

The outer surface of a hollow sphere of aluminium will act as a convex mirror.

The inner and outer surface temperatures of a glass window

Asked by admin @ 02/12/2021 in Engineering viewed by 395 persons

1. A glass window of width W = 1 m and height H = 2 m is 5 mm thick and has a thermal conductivity of kg = 1.4 W/m*K. …

How to find the total surface area of a sphere

Asked by admin @ 22/11/2021 in Mathematics viewed by 309 persons

Find the total surface area of a sphere with a radius of 9 m

How do you find the surface area of a sphere

Asked by admin @ 07/11/2021 in Mathematics viewed by 289 persons

3. The formula to find the surface area of a sphere is to take the radius of the sphere and square it and multiply that amount by pi and then …

What is the formula for surface area of a sphere

Asked by admin @ 04/11/2021 in Mathematics viewed by 305 persons

3. The formula to find the surface area of a sphere is to take the radius of the sphere and square it and multiply that amount by pi and then …

How do you calculate the surface area of a sphere

Asked by admin @ 28/10/2021 in Mathematics viewed by 284 persons

3. The formula to find the surface area of a sphere is to take the radius of the sphere and square it and multiply that amount by pi and then …

How to find out the surface area of a sphere

Asked by admin @ 28/10/2021 in Mathematics viewed by 285 persons

Work out the surface area of this sphere. Give your answer to 1 decimal place.

A mark on the surface of a glass sphere

Asked by admin @ 20/08/2021 in Math viewed by 269 persons

A mark on the surface of a glass sphere is viewed from a diametrically opposite position. It appears to be at a distance 10 cm from its actual position. The …

A sphere and a cube have the same surface

Asked by admin @ 20/08/2021 in Math viewed by 322 persons

a sphere and a cube have equal surface areas. show that the ratio of their volume of a sphere to that of a cube is root over 6 :root over …

The difference between the outer and inner curved surface

Asked by admin @ 20/08/2021 in Math viewed by 370 persons

The difference between the outer and inner curved surface areas of a hollow right circular cylinder, 14cm long, is 88cm2. If the volune of meta l used in making the …

The difference between outer and inner curved surface area

Asked by admin @ 17/08/2021 in Math viewed by 376 persons

The difference between the outer and inner curved surface areas of a hollow right circular cylinder, 14cm long, is 88cm2. If the volune of meta l used in making the …

Find the surface area of a sphere of diameter

Asked by admin @ 17/08/2021 in Math viewed by 368 persons

Find the surface area of a sphere of diameter: (i) 14cm (ii) 21 cm (iii) 3.5m

A solid sphere rolling on a rough horizontal surface

Asked by admin @ 17/08/2021 in Physics viewed by 317 persons

a solid sphere rolling on a rough horizontal surface with a linear speed v collides elastically with a fixed smooth vertical wall find the speed of the sphere after it …

A smooth sphere is moving on a horizontal surface

Asked by admin @ 13/08/2021 in Physics viewed by 324 persons

A smooth sphere is moving on a horizontal surface with velocity vector 2i+2j immediately before it hits a vertical wall. The wall is parallel to j vector and the coefficient …

Find the surface area of sphere of radius 14cm

Asked by admin @ 13/08/2021 in Math viewed by 290 persons

Find the surface area of sphere whose radius is 14 cm

A solid sphere is rolling on a frictionless horizontal surface

Asked by admin @ 04/08/2021 in Physics viewed by 334 persons

A solid sphere is rolling on a frictionless horizontal surface, with a translational velocity v m/s. If it is to climb a rough inclined surface of height h, when v …