If you grow bacteria in heavy nitrogen and then switched them to light nitrogen, how many generations after switching would have some light `//` light DNA ?

10 tube lights are in a hall and there are10 switchs are in every tube light. How many way the hall islighting?

What actually travels through the wires when you switch on a light?

Bacteria were grown in a medium containing heavy isotope of nitrogen (N^(15)) for many generations and all their DNA contained many heavy nitrogen only. A bacterium of this type was transferred to nomal medium and allowed to duplicate . After two divisions of heavy DNA is likely to be that

When you flip a switch to turn on a light, the delay before the light turns on is determined by:

Explain the energy changes taking place in the following situations: (a) Switching on a flash light. (b) Using coal to generate electricity.