Units and Measurement

The unit of dynamic viscosity is the Pascal-second (Pa*s). Steradian is for solid angles, and Newton-second is for impulse.

Impulse is defined as force multiplied by time, so its SI unit is Newton-second (N-s). Pascal is the unit of pressure.

The steradian is the SI unit of solid angle. It is a three-dimensional analogue of the radian.

 mho or siemens are the units of conductance

The Newton is the SI unit of force, including electric force. The Coulomb is the unit of electric charge, and the Farad is the unit of electric capacitance.

The Farad is the SI unit of electrical capacitance. A capacitor's ability to store charge is measured in Farads.

The Angstrom is a unit of length equal to 10^-10 meters, commonly used to express the size of atoms and inter-atomic distances in solids. Microns are larger, and light years are for astronomical distances.

The Coulomb is the SI unit of electric charge. It represents the amount of charge transported by a constant current of one ampere in one second.

SI unit of wavelength is meter.

Si unit of frequency is hertz.

Joule is the unit of energy.

Supersonic speed is measured in Mach numbers, which represent the ratio of the speed of an object to the speed of sound in the surrounding medium. The option 'MAC' is a common phonetic or typographical representation of 'Mach'.

ANS 4.

The Coulomb is the SI unit of electric charge, representing the amount of charge transported by a constant current of one ampere in one second.