circular measures

Radian measure [Circular system] - A radian is the measure of an angle at the centre of a circle subtended by an arc, whose arc length is equal to the radius of the circl..

A radian is the measure of an angle at the centre of a circle subtended by an arc, whose arc length is equal to the radius of the circl..

A circular hole of diameter d = 3 m is digged on a levelled plot of land shown to a depth of 4 m and the sand so obtained is spread evenly over the rectangular portion of measurement a × b = 7 m × 14 m. What is the increase in the level of the rectangular plot? [Take..

Let moon be the astronomical object of diameter D. Let E be the point on earth's surface. A telescope is focused on moon's surface and its image is observed as shown in figure is measured. S is the distance between moon and the Earth's surface. The diameter AB of moon is considered as a h..

Micrometer screw-gauge is another instrument used for measuring accurately the diameter of a thin wire or the thickness of a sheet of metal. It consists of a U-shaped frame fitted with a screwed spindle which is attached to a thimble. Screw-gauge The screw has a known pitch such as 0.5 mm..

The wire whose thickness is to be determined is placed between the anvil and spindle end, the thimble is rotated till the wire is firmly held between the anvil and the spindle. The rachet is provided to avoid excessive pressure on the wire. It prevents the spindle from further movement. The thickne..

Summary - Trigonometry is that branch of mathematics which deals with the measurements of sides and angles of triangles. The figure obtained by rotating a given ray about its end point is called an angle. An angle is called positive if the direction of rotation of ray from initial side to..

The second law of motion improves our understanding of most types of motion involving a force. We get to understand that if a body is pushed with a stronger force, it accelerates at a faster rate and vice versa. We understand that if two different bodies are pushed with an equal force, the product ..

Apparent Loss of Mass - You must have seen that when substances like wood, wax, coal, oil, etc. are burnt, they seem to disappear, or leave a very small quantity of residue. It looks as if the mass is much lesser. Well, the loss of some mass of these substances is only apparent. As per the Law of c..