The correct answer is
b. low frequencies and low energy.
In fact, microwaves and radio waves have frequency up to 
, which are really low compared, for instance, to the frequency of gamma rays (
). Moreover, the energy of an electromagnetic wave is directly proportional to its frequency:
where h is the Planck constant and f the frequency; therefore, low frequency means also low energy.
Answer:
because liquid and solid states of water possesses intermolecular force of attraction which held the molecules of water in fixed
Explanation:
Yes, in order to determine whether two geometric figures are identical or not we tend to rotate one of the figure clockwise or anti clock wise mentally. However, in clockwise rotation larger the angel more will be the time taken for instance, it will take longer to rotate 120° than to rotate 40°. Whereas in anti clockwise ration it will be vice versa.
There are no correct descriptive statement on the list you included.
