Children's Encyclopedia1976 |
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Pàgina 11
... atoms in the air are electrified by streams of particles coming in from space . These electrified atoms are very useful to us . They reflect radio waves back to earth a long way away . So we can send radio waves round the earth by ...
... atoms in the air are electrified by streams of particles coming in from space . These electrified atoms are very useful to us . They reflect radio waves back to earth a long way away . So we can send radio waves round the earth by ...
Pàgina 15
... Atom We all know that when an atom bomb explodes a huge amount of energy is let loose . There is an enormous amount of heat , light and noise . In atomic power stations we can now control atomic explosions . We can slow up the ...
... Atom We all know that when an atom bomb explodes a huge amount of energy is let loose . There is an enormous amount of heat , light and noise . In atomic power stations we can now control atomic explosions . We can slow up the ...
Pàgina 51
... atomic weapons needs the older type of atomic bomb just to set it off ! Huge missiles can travel thousands of miles to bomb a target . 4 GC Some famous weapons of World War II : 1. A German ' Stuka ' dive bomber , used for blasting ...
... atomic weapons needs the older type of atomic bomb just to set it off ! Huge missiles can travel thousands of miles to bomb a target . 4 GC Some famous weapons of World War II : 1. A German ' Stuka ' dive bomber , used for blasting ...
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