At a place the angle of dip is `30^@ ` and vertical component is 0.30 CGS units. Calculate the Resultant Intesity.

At a place the angle od dip is 30^@S and vertical component is 0.30 C CGS units. Calculate the Horizonal component.

At a place the angle of dip is 30^@ and the vertical intensity is 0.3 CGS units. Find the horizontal and resultant intensities.

A first order reaction is 30% completed in 30 minutes. Calculate the half-life.

If critical angle for two media is 30^o find the R.I.