Conceptual Physics was written by and is associated to the ISBN: 9780321909107. Since the solution to 30E from 21 chapter was answered, more than 236 students have viewed the full step-by-step answer. The full step-by-step solution to problem: 30E from chapter: 21 was answered by , our top Physics solution expert on 04/03/17, 08:01AM. This textbook survival guide was created for the textbook: Conceptual Physics, edition: 12. This full solution covers the following key subjects: helium, Sound, Person, air, high. This expansive textbook survival guide covers 45 chapters, and 4650 solutions. The answer to “After inhaling helium gas, a person talks with a high-pitched voice. One of the reasons for this is the higher speed of sound in helium than in air. Why does sound travel faster in helium?” is broken down into a number of easy to follow steps, and 35 words.