Measurements of Physical Quantities

Name the physical quantity whose S.I. unit is $\mathrm{J} {\mathrm{C}}^{-1}$. Is it a scalar or a vector quantity?

The density of material in the CGS system of units is $\frac{4g}{{\mathrm{cm}}^3}$. In a system of units in which unit of length is $10 \mathrm{cm}$ and unit of mass is$100 \mathrm{g}$, the value of density of material will be

The density of material in the CGS system of units is  $4 \mathrm{g} {\mathrm{cm}}^{-3}$. In a system of units in which unit of  length is $10 \mathrm{cm}$ and the unit of  mass  is $100 \mathrm{g}$, the value of density of the material will be

The ‘rad’ is the correct unit used to report the measurement of

The surface tension of water in C.G.S. units is$70 \mathrm{dyne} {\mathrm{cm}}^{-1}$ . It's S.I. unit is

The instrument used to separate compounds based on their mass to charge ratio is-

Choose the incorrection version from the following.

Mass of an object depends on-

Which one of the following is not a physical quantity?

The mean of two samples of the sizes $250$ and $320$ were found to be $20, 12$ respectively. Their standard deviations were $2 \& 5$, respectively. Find the variance of combined sample of size $650$.

If the standard deviation of a data is $0.012$. Find the variance

Irregular variations in a time series are caused by 

What is measurement of mass ?

What are different ways to measure length?

What are the three different methods to measure length?

What are lengths measured in?

What are the methods for the measurement of the small distance and large distance?

Which device is used for measuring small amount of electric current?