For the following reaction the reaction with bromobutane would occur while the reaction with chlorobutane would be very slow. What is the explanation for this difference in reactivity

Chromosome 17 is made of over million base pairs.

Light waves travel than sound waves.

Two people each hold the end of a rope and create waves by moving their arms up and down. this wave is best classified as a transverse wave because a) both the rope particles and the wave are moving in the same direction. b) the wave is moving up and down as the particles of the rope move horizontally. c) the wave is moving horizontally as the particles of the rope move up and down. eliminate d) the wave is moving in a parallel direction with the motion of the person's arms.