Question

If energy E, velocity V and time t are chosen as fundamental quantities, then the dimensional formula of surface tension is

• A. [EV^–2T^–2]
• B. [EV^–1T^–2]
• C. [EV^–2T^–1]
• D. [E²V^–1T^–2]

Answer 1

Answer: (A)

$EV^–2T^–2$

Answer 2

T µ E^a V^b t^c

[M¹L⁰T^–2] = [M¹L²T²]^a [L¹T^–1]^b [T¹]^c

solving we get

a = 1, b = – 2, c = –2