Select the correct answer. What is the wavelength of radio waves?
A.
between 1 x 10-3 and 1 x 10-1 meters
B.
less than 1 x 10-11 meters
C.
more than 1 x 10-1 meters
D.
between 1 x 10-8.4 x 10-7 meters
E.
between 4 x 10-7-7 x 10-7 meters

Which of the following warnings would an agricultural chemist tell a farmer who wants to recycle his or her own ammonia? recycling ammonia is a difficult process that sometimes takes weeks. recycling ammonia requires a degree in biochemistry or a related field. recycling ammonia can be harmful because it is highly flammable and toxic. recycling ammonia costs too much money considering the price of the necessary chemicals.