Which of the following herbicides is applied before crops start growing, to eliminate weeds in a field?
atrazine
bromoxynil
cyanazine
diquat

State one advantage and one disadvantage of using a plane mirrior as a driving mirrior

Which one of the following research methods can show cause and effect

When the displacement of a mass on a spring is 12a the half of the amplitude, what fraction of the mechanical energy is kinetic energy? at what displacement, as a fraction of a, is the mechanical energy half kinetic and half potential?