Explain why water in a narrow glass tube has a concave meniscus while mercury, in the same tube, has a convex meniscus.

State: (a) the difference between plane polarized light and ordinary light; (b) two uses of polaroids.

(a). State: (a) two applications of electrolysis in an industry (b) one application of electrolysis in a school laboratory.

A stone projected horizontally from the top of a tower with a speed of 4 ms\(^{-1}\) lands on the level ground at a horizontal distance of 25 m from the foot...

In fig. la and fig.1 b above, Ida and Wb represent the respective loads on a spring placedtiear a 30 cm rule, when in air and when in water: (a) Identify the...

State three methods of polarizing an unpolarized light

(a) Explain diffusion. (b) Give one reason why the rate of diffusion is higher in gases than in liquids at the same temperature.

The uncertainty in determining the duration during which an electron remains in a particular energy level before returning to the ground state is 2.0 x 10\(^...

An electron of charge 1.60 x 10\(^{-19}\) C is accelerated under a potential difference of 1.0 x 10\(^5\) V. Calculate the energy of the electron in joules.