Source of Energy

What type of nuclei is (preferably) needed for slowing down fast neutrons?

If power of nuclear reactor is$100 watt$ then rate of nuclear fission is :-

The mass equivalent of energy $2.7\times {10}^{14} \mathrm{J}$ is

The energy equivalent of $5 \mathrm{g}$ of a substance is

If the rate of emission of energy from a star is $2.7\times {10}^{36} \mathrm{J} {\mathrm{s}}^{-1}$, the rate of loss of mass in the star will be

Calculate the energy equivalent of $1\mathrm{g}$ of substance

A nuclear reactor delivers a power of ${10}^9 \mathrm{W}$. What is the amount of fuel consumed by the reactor in one hour ?

Einstein was awarded Nobel prize for

The control rods used in the reactor of a nuclear power plant are made of _____.

Wind energy utilises......

Consider the items listed in column I and II below:

The most appropriate matching of items in the two columns is given by

Describe photoelectric effect on the basis of its applications and importance.

In a nuclear reactor, the following fission reaction occurs

${}_{92}{}^{235}\mathrm{U}+{}_0{}^1\mathrm{n}\to {}_{56}{}^{141}\mathrm{Ba}+{}_{36}{}^{92}\mathrm{Kr}+\mathrm{neutrons}$

Control rods made of Cadmium are inserted to remove extra neutrons. How many neutrons need to be removed for each of the above reactions so that the reactor remains critical?

Define nuclear chain reaction.

Explain the ways to conserve an ocean.

Describe the importance of conservation of oceans.

Explain the importance of oceans for living and non-living components.

Explain the ways to conserve a forest.

Describe the importance of conservation of forest.