micrometer

Measurement and Experimentation..

Micrometer Screw-Gauge - 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 scr..

If a represents the amplitude in micrometers of the vertical ground motion at the receiving station, T represents the period of the associated seismic wave in seconds, and B represents weakening of the seismic with increasing distance from the epicenter of an earth quake, then choose the ..

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..

Let us consider the following entries in a Students' Journal: (a) Weight of a calorimeter = 42 g (measuring instrument used is spring balance) The smallest reading the spring balance can record is 1g. There are 42 of 1 g units of measurement. Hence, there are two significant figures in the result. ..

The cells and their compounds like cell organelles are measured in terms of the fractions of a millimeter, because of their extremely small size. The commonly used terminologies for these units are micron, nanometer and Angstrom. a) A micron or micrometer is one thousandth of a millimete..

The accuracy of a measuring instrument depends upon the least count of the measuring instrument. For example, length of a body that can be measured using a tailor's tape, cannot be beyond the minimum and maximum length of the measuring tape. Least count of this tape is the least distance that can ..

The photosynthetic pigments chlorophylls are present in the leaves because of which the leaves are green in colour and are called the photosynthetic organs. The leaves have the following structure: Histological Details of a Leaf in Cross Section As shown in the diagram, the mesophyll region of the ..

Photosynthetic Apparatus - The photosynthetic pigments chlorophylls are present in the leaves because of which the leaves are green in colour and are called the photosynthetic organs. The leaves have the following structure: Histological Details of a Leaf in Cross Section As shown in the diagram, t..

Radius = 2.185 cm = 2.18 cm To the required number of significant figures. Example 7: The diagram shown below shows a part of the linear scale and head scale (circular scale) of a micrometer screw which is used to measure the thickness of a glass plate. Calculate the thickness (pitch=0.5 m..