Which of the following is smallest unit
Millimetre
Angstrom
Fermi
Metre
In a relation $F = a \,sin\, k_1x + b \,sin\, k_2t$ where $F , x$ and $T$ denote the force,distance and time respectively. Units of $k _{1}$ and $k _{2}$ are respectively
In $C.G.S$. system the magnitutde of the force is $100$ dynes. In another system where the fundamental physical quantities are kilogram, metre and minute, the magnitude of the force is
The units of modulus of rigidity are
In $S = a + bt + c{t^2}$. $S$ is measured in metres and $t$ in seconds. The unit of $c$ is
Young's modulus of a material has the same units as