Last seen: Sep 30, 2021
Nitrogen and phosphorous.
(a) For a nuclear reactor - element ‘B’ with mass number 235 is suitable as a fuel in a nuclear reactor. (b) For a hydrogen bomb - element ‘A’ with ...
It is not possible to make use of solar cells to meet all our energy needs because: (i) of limited availability of special grade semiconducting mate...
Germanium, Silicon.
Uranium-235.
Principle of working of OTEC: The water at the surface of the ocean is warmer than the water at deeper depths. This temperature difference can be used...
Renewable Source of Energy: (i) They are constantly supplied by nature and are inexhaustible. (ii) Low cost of operation. (iii) They produce lit...
20°C or 293 K in trapping geothermal energy.
Acid rain: The rain containing the acidic oxides such as oxides of carbon, nitrogen and sulphur.
(a) The values exhibited by Neha are: (i) Responsible citizen in the conservation of energy resources. (ii) Adopt fuel and money saving techniqu...
(a) The two values shown by the teachers mentioned by the principle are: (i) Eco-friendly life style. (ii) Co-ordination and friendship. (b) (i...
(a) The decision of installing the solar water heater was correct this is due to (i) Their system use solar energy which is a renewable source of e...
(a) The possible mistakes were made by Mariyam are: The outer and interior of solar cooker might not have been blackened. Instead of using glass ...
(i) Advantage of solar water heater (a) Once solar water heater installed, the family and society never need to pay for heating up the water again....
(i) Activities that Ramesh have had assigned for the students are: (a) Hands on projects related to renewable and non-renewable sources of energy. ...
Advantages of charcoal over wood It has higher calorific value, i.e. higher heat generating efficiency. Charcoal does not produce smoke on burnin...
LPG is considered as an ideal fuel because It is easy to store, handle and transport. It produces large amount of heat on burning. It does not l...
Germanium, Silicon.