Units and Measu...

Dimensional equation of universal constant of gravitation is:

In the context of accuracy to measurement and significant figures in expressing results of experiment, which of the following is/are correct?
(1) Out of the measurements 50.14 cm and 0.00025 ampere, the first one has greater accuracy.
(2) If one travels 478 km by rail and 397 m. by road, the total distance traveled is 478 km.

The dimensions of planck's constant equal to that of 

In the formula : y = a sin ( at - b), where y - position, t - time and A, a, b are constants. What will be the dimensional formula of $$\frac{b}{a}$$?

The radius of a sphere is $$(2.6 \pm 0.1)$$ cm. The percentage error in its volume is

The dimensions of emf in MKS is:

The dimension of $$\left( \dfrac { 1 }{ 2 }  \right) { \varepsilon  }_{ 0 }{ E }^{ 2 }$$ is($${ \varepsilon  }_{ 0 }$$: permittivity of free space, Electric field)

Write down the significant figures in the following
1. $$5238$$ N
2. $$4200 $$kg

The dimension of the magnetic field intensity B is  

The dimension of combination $$\dfrac{L}{CVR}$$ are same as dimensions of