Is chex mix an example of a pure substance or mixture?

Design techniques and materials that reduce the negative environmental impact of a structure are referred to as

Joan writes four numbers on the board in standard form, and then she writes their scientific notation

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.