Concepts Of Physics MCQ Edition [Volume 1]PhysicsIntroduction to Physics
The surface tension of water is 72 dyne/cm . Convert this value into SI units.
Options
- A720 N/m
- B0.072 N/m
- C0.72 N/m
- D7.2 N/m
Correct answer
B. 0.072 N/m
Step-by-step solution
The given value of surface tension is 72 dyne/cm . The SI unit of surface tension is N/m . Using the conversion factors: 1 dyne = 10⁻⁵ N 1 cm = 10⁻² m Substituting these into the given value: 72 dyne/cm = 72 10⁻⁵ N 10⁻² m = 72 10⁻³ N/m = 0.072 N/m