Which of the following statements is untrue in regard to sound traveling in air? a. sound waves in the air are transverse and consist of compressions and rarefactions of air molecules. b. as the distance from the earth increases, the sound wave intensity also decreases due to the lessening density. c. during a single vibration of the diaphragm, molecules in the air near it will also complete one vibration. d. the area covered by the wave front increases as the wave advances, but the energy passing through a wave front in a unit of time decreases.

Classify each possible hypothesis about a medicinal aloe vera plant as falsifiable or non-falsifiable. aloe vera gel is the best natural skin moisturizer. aloe vera gel can heal wounds by boosting cell renewal. aloe vera juice tastes better than carrot juice. drinking aloe juice can reduce the risk of lung cancer.

The speed of sound in ice, water, and steam is shown. what best explains the speed of sound in different states of matter? sound travels fastest in ice because energy is easier to transfer when the molecules are close together. sound travels slowest in steam because the sound has to move around the gas molecules that are far apart. sound travels fastest in ice because the temperature of solids is always greater, so the heat transfers the sound energy. sound travels slowest in steam because the pressure is so great the sound cannot travel though the steam particles.

Write the function getkthdigit(n, k) that takes a possibly-negative int n and a non-negative int k, and returns the kth digit of n, starting from 0, counting from the right