Which of the following statements is accurate?
can someone me with this question?

The option B is correct.

#in my opinion#

Explanation:

As we know that the wavelength is the length of one wave and is measured in case of longitudinal wave as the distance between two consecutive compressions or rarefactions and in case of transverse wave as distance between two consecutive crests or troughs THUS in both cases we measure the distance in the direction of the wave (parallel to the wave).

answer: c. the experiment shows that the red substance experienced a chemical change.

explanation: chemical change is the change in which chemical composition of the substance changes. physical change is the change in which there is no change in chemical composition.

chemical changes are accompanied by following changes:

a) precipitate formation

b) energy is released or absorbed

c) formation of bubbles

d) change in color

as it is given that the red color has disappeared and there is production of gas, it means the red substance has undergone a chemical change.

e