MEASUREMENTS AND UNITS by THASNEEM ASLAM https://padlet.com/thasneemaslamabc/r7du4bea26r9o3k7 Made with charm en-us 2021-01-13 13:22:16 UTC 2026-03-04 18:42:09 UTC hello@padlet.com Introduction thasneemaslamabc https://padlet.com/thasneemaslamabc/r7du4bea26r9o3k7/wish/1082918866 In olden days different scales were used for measuring length in different countries. Vaara, One forearm (muzham) etc are some of such units. These units were not accurate. For solving this problem a standard scale of a definite length has been recognised world widw for measuring length. This standard scale is the unut of length. The basic unit of length is In olden days different scales were used for measuring length in different countries. Vaara, One forearm (muzham) etc are some of such units. These units were not accurate. For solving this problem a standard scale of a definite length has been recognised world widw for measuring length. This standard scale is the unit of length. The basic unit of length is metre (m).]]> 2021-01-13 13:40:18 UTC https://padlet.com/thasneemaslamabc/r7du4bea26r9o3k7/wish/1082918866 Smaller units of length thasneemaslamabc https://padlet.com/thasneemaslamabc/r7du4bea26r9o3k7/wish/1082962934 Examine the metre scale. You can see small measurements on it. These are centimetre (cm) and millimetre(mm)
1m = 1oocm 1cm=1omm
The smallest length that can be accurately measured using a metre scale is its least count.]]> 2021-01-13 13:50:58 UTC https://padlet.com/thasneemaslamabc/r7du4bea26r9o3k7/wish/1082962934 Thickness of paper thasneemaslamabc https://padlet.com/thasneemaslamabc/r7du4bea26r9o3k7/wish/1083049336
We cannot measure the thickness of the paper even with these small units. Take too sheets of paper and pile it up to make a bundle. Measure the height of this bundle using a scale. If it falls in between two markings, make suitable changes in the number of sheets. Then measure its height. By dividing this height by the number of sheets, we will get the thickness of a sheet of paper.
Similarly to find out the thickness of thin wire roll it on a pencil and mea-sure the length of ten rolls Then divide it by 10.


]]> 2021-01-13 14:09:56 UTC https://padlet.com/thasneemaslamabc/r7du4bea26r9o3k7/wish/1083049336 Length of a curved line thasneemaslamabc https://padlet.com/thasneemaslamabc/r7du4bea26r9o3k7/wish/1083062117 To measure the length of the curved line put a thread on it and measure its length using a meter scale]]> 2021-01-13 14:12:34 UTC https://padlet.com/thasneemaslamabc/r7du4bea26r9o3k7/wish/1083062117 Distance of a sphere thasneemaslamabc https://padlet.com/thasneemaslamabc/r7du4bea26r9o3k7/wish/1083067683 A ball kept in between two wooden blocks, whose diameter is to be measured. Then we will get its diameter.]]> 2021-01-13 14:13:39 UTC https://padlet.com/thasneemaslamabc/r7du4bea26r9o3k7/wish/1083067683 Various measurements of length thasneemaslamabc https://padlet.com/thasneemaslamabc/r7du4bea26r9o3k7/wish/1083072656 The basic unit of length is metre. Smaller units like centimetre (cm), millimetre (mm), micrometre (micron – ™ nano-metre (nm) are also used in certain situa-tions for convenience. We use a bigger unit like kilometre (km) to measure the distance between two places. Units like astronomical unit (AU), light year (ly) are also used to measuring distance to planets or stars.]]> 2021-01-13 14:14:41 UTC https://padlet.com/thasneemaslamabc/r7du4bea26r9o3k7/wish/1083072656 Mass thasneemaslamabc https://padlet.com/thasneemaslamabc/r7du4bea26r9o3k7/wish/1083078140 Mass is the measure of quantity of matter contained in it. The basic unit of mass is kilogram(kg).

Except kilogram, milligram(mg), gram(g), quintal, tonne are also the units of mass.

]]> 2021-01-13 14:15:52 UTC https://padlet.com/thasneemaslamabc/r7du4bea26r9o3k7/wish/1083078140 Time thasneemaslamabc https://padlet.com/thasneemaslamabc/r7du4bea26r9o3k7/wish/1083082001 The symbol is s.
60s = iminute; 6ominute = 1 hour One second is 1/ 86400 part of an average solar day.]]> 2021-01-13 14:16:41 UTC https://padlet.com/thasneemaslamabc/r7du4bea26r9o3k7/wish/1083082001 Fundamental units thasneemaslamabc https://padlet.com/thasneemaslamabc/r7du4bea26r9o3k7/wish/1083085473 There are some quantities which are not related to one another and cannot be expressed using other quantities. Such quantities are fundamental quantities. The units of the fundamental quantities are the Fundamental Units. The system based on these fundamental units is the | International System of Units. Its short form is SI Units.]]> 2021-01-13 14:17:25 UTC https://padlet.com/thasneemaslamabc/r7du4bea26r9o3k7/wish/1083085473 Derived unit thasneemaslamabc https://padlet.com/thasneemaslamabc/r7du4bea26r9o3k7/wish/1083088509 Units which are expressed in terms of fundamental units or those units which are dependent on fundamental units are derived units.
Ex. Area = length x breadth

Unit of area = unit of length x unit of breadth = m xm = m2.

]]> 2021-01-13 14:18:05 UTC https://padlet.com/thasneemaslamabc/r7du4bea26r9o3k7/wish/1083088509 Salient features of SI units thasneemaslamabc https://padlet.com/thasneemaslamabc/r7du4bea26r9o3k7/wish/1083093573
  • Unified units
  •  Internationally accepted
  •  Adequate to express all physical quantities.

    • ]]>     2021-01-13 14:19:08 UTC https://padlet.com/thasneemaslamabc/r7du4bea26r9o3k7/wish/1083093573     Density and volume thasneemaslamabc https://padlet.com/thasneemaslamabc/r7du4bea26r9o3k7/wish/1083096730 The space occupied by a body is referred to as its volume.
    The unit of volume is cubic metre (m3)

    Mass per unit volume of substance is its density. Density = mass/volume Unit of density = unit of mass/unit of volume = kg/m3

    ]]>     2021-01-13 14:19:47 UTC https://padlet.com/thasneemaslamabc/r7du4bea26r9o3k7/wish/1083096730     The rules to be followed while writing units thasneemaslamabc https://padlet.com/thasneemaslamabc/r7du4bea26r9o3k7/wish/1083105518 We have to observe certain rules according to international standards while using these units and their symbols. They are given below:

    1. The symbols of units are normally written using small letters in the English alphabet, eg. m (metre), s (second), kg (kilogram)
    2. But there are certain occasions on which capital letters of the English alphabet are used as symbols. The units named after persons are written like this.
    3. While writing the names of units never use capital letters, eg. kelvin (correct) Kelvin (wrong) newton (correct) Newton (wrong)
    4. Never use the plural form for symbols, eg. 10 kg (correct) 10 kgs (wrong) 75 cm (correct) 75 cms (wrong)
    5. Never use full stop or comma after a
      symbol except at the end of a sentence. eg. 75 cm is the length of a table, (correct) 75 cm. is the length of a table, (wrong),
    6. While writing derived units a slash (/) is used to denote division. But never use more than one slash in one derived unit. eg. m/s1 (correct) m/s/ s (wrong)
    7. When a derived unit is expressed as the product of other units use a dot or a space between them. eg. N.m or Nm
    8. 8. Do not mix the name of a unit with the symbol.
    9. While writing units along with a value, there must be single space between them.
    10. Never use more than one unit to express a physical quantity.
    ]]>     2021-01-13 14:21:36 UTC https://padlet.com/thasneemaslamabc/r7du4bea26r9o3k7/wish/1083105518     thasneemaslamabc https://padlet.com/thasneemaslamabc/r7du4bea26r9o3k7/wish/1083116978 2021-01-13 14:23:58 UTC https://padlet.com/thasneemaslamabc/r7du4bea26r9o3k7/wish/1083116978 Related video links thasneemaslamabc https://padlet.com/thasneemaslamabc/r7du4bea26r9o3k7/wish/1083135963 https://youtu.be/Z0CcUyFzeZ4
    https://youtu.be/oAtDAoqdExw
    https://youtu.be/7vT-988yH3M]]>     2021-01-13 14:27:55 UTC https://padlet.com/thasneemaslamabc/r7du4bea26r9o3k7/wish/1083135963