State: (a) The S.I. unit of the intensity of a blackbody radiation. (b) Two features of the intensity-wavelength graph of a perfect blackbody at different t...

(a)(i) State the law of inertia. (ii) Use the law stated in (a)(I) to explain how wearing a safety belt in a moving vehicle could reduce the possibilities of...

State three properties of a semiconductor.

The effective potential energy, E, of a lunar satellite of mass, m, moving in an. elliptical orbit around the moon of mass, m, is given by \[ E = \frac{K^2}{...

(a) What is a geostationary satellite? (b) Name two types of Lasers.

A \(50\ \mathrm{N}\) force is applied to the free end of a spiral spring of force constant, \(100\ \mathrm{N\,m^{-1}}\). Calculate the work done by the force...

State three differences between magnetic and non-magnetic materials.

(a)(i) State Coulomb's law of electrostatics. (ii) The electron and proton of a hydrogen atom are separated by a mean distance of \(5.2 \times 10^{-11}\,\tex...

The diagram above illustrates the trajectory of a fired missile from point P at 250 ms-1 If the missile point Q after 40 s, calculate the distance |PQ|