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 😜read Measurement And Units Physics is based on measurement of physical quantities.Certain physical quantities have been chosen as base quantities (such as length, time, and mass); each has been defined in terms of a standard and given a unit of measure (such as meter,second, and kilogram). Other physical quantities are defined in terms of the base quantities and their standards and units.   Measuring Things We discover physics by learning how to measure the quantities involved in physics . Among these quantities are length, time, mass, temperature, pressure, and electric current. We measure each physical quantity in its own units, by comparison with a standard. The unit is a unique name we assign to measures of that quantity—for example, meter (m) for the quantity length. The standard corresponds to exactly 1.0 unit of the quantity. As you will see, the standard for length, which corresponds. Classification of physical quantities(derived and fundamental or base quanti...

😋read  Laws of indices Example:  a)8=2*2*2= 2^3      b)a*a*a*a*a*a= a^6     c)625=25*25= 25^2      d)81=3*3*3*3= 3^4    e)c*c*c=c^3.   Every unit highlighted in red above. Is said to be in its index form . A form where it possesses a base digit and a power digit. These are instances  of some units in their index form. 2^-3 3^a a^c d^0.5 We begin from the first to the last law of indices as written below: 👇👇  1. MULTIPLICATION LAW; a^b *a^c= a^(b+c) 2^3*2^2=2^(3+2)=2^5=32 to confirm; 2^3*2^2=(2*2*2)*(2*2)=8*4=32 note carefully, this can only be made possible if both bases are equal a^b*d^c = (ad)^b+c 2. DIVISION LAW; a^b /a^c= a^(b-c) 2^3/2^2=2^(3-2)=2^1=2 provided there is an absence of an unequal base 3. zero index LAW ; a^0= 1;        provide a is not the same as ze...