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प्रश्न
State the energy changes which take place when:
A magnesium ribbon burns in air.
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उत्तर
During the burning of magnesium, chemical energy changes to heat and light energy.
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संबंधित प्रश्न
State one important advantage and disadvantage each of using nuclear energy for producing electricity.
State two disadvantages of geothermal energy.
Geothermal energy is produced by the:
(a) fission of radioactive materials
(b) burning of coal inside the coal mines
(c) combustion of natural gas deep inside the earth
(d) fusion of radioactive substances
State two factors on which the kinetic energy of a moving body depends.
Give one relevant example for the following transformations of energy:
Chemical energy to heat energy.
Name five renewable sources of energy.
Renewable source of energy is:
Name the energy changes for each of the following cases:
dynamo
Calculate the decrease in the kinetic energy of a moving body if its velocity reduces to half of the initial velocity.
State two advantages and disadvantages of using nuclear energy for producing electricity.
