Uncertainty in Measurement

The unit of permittivity of free space,  ${\epsilon }_0$  is:

The dimensional formula for magnetic flux is

Using mass$\left(M\right)$, length$\left(L\right)$, time$\left(T\right)$ and current$\left(A\right)$ as the fundamental quantities, the dimensions of permeability are 

Which one of the following represents the correct dimensions of the coefficient of viscosity?

Identify the pair whose dimensions are equal –

$A^x+A^x=A^{2x}$

$4\times {15}^3-2\times {10}^2$ is 

Find the value of $2\times {10}^{12}+4\times {10}^{10}$.

The position of a particle at time $t$ is given by the equation $x\left(t\right)=\frac{v_0}{A}\left(1-e^{At}\right)$, where $v_0=$ constant and $A>0$. Dimensions of $U_{\mathit{0}}$ and $A$ respectively are

The number of significant figures are present in $208$ is _____.

Given the number: $161 \mathrm{cm}; 0.161 \mathrm{cm}; 0.0161 \mathrm{cm}$. The number of signification figures for three numbers is:

The number of significant figures are present in $500.0$ is _____.

The time period of a body undergoing simple harmonic motion is given by $T=p^a{D}^b{S}^c,$ where $p$ is the pressure, $D$ is density and $S$ is surface tension. The values of $a,b$ and $c$ respectively are

Among the following, the correct statement is :

How many significant figures are present in the following number?

$0.00456$

Represent the following number in scientific notation:

$3068.789$