800 kW hr
750 kW hr
1200 kW hr
1250 kW hr
The energy stored in a watch spring is
The enormous amount of energy released in an explosion of an atomic bomb is due to the
The fibre of the electric bulb is formed.
The filament of an electric lamp becomes white hot but the lead-in wires holding the filament are only slightly heated because they
The filament of electric bulb is made up of:
The final image in a simple microscope is
The first step to getting output from a laser is to excite an active medium. What is this process called?
The flow of thermal energy is called
The flying of birds is a proof of Newtons
The focal length of a concave mirror with a radius of curvature of 20.0 cm is
