Question

________ In many cartoon shows, a character runs off a cliff, realizes his predicament, and lets out a scream. He continues to scream as he falls. If the physical situation is portrayed correctly, from the vantage point of an observer at the top of the cliff leaning over the edge, the pitch of the scream as he falls should be A) higher than the original pitch and constant. B) higher than the original pitch and increasing as he falls. C) lower than the original pitch and constant. D) lower than the original pitch and decreasing as he falls. E) It is impossible to predict. ______ You are standing on a skateboard, initially at rest A friend throws a very heavy ball towards you. You have two choices about what to do with the ball: either catch the ball or deflect it back toward your friend with the same speed as it was originally thrown. Which choice should you make in order to maximize your speed on the skateboard? A) Catch the ball. B) Deflect the ball back. _______ Which of the following is a FALSE statement? A) In a transverse wave the particle motion is perpendicular to the velocity vector of the wave. B) Not all waves are mechanical in nature. C) The speed of a wave and the speed of the vibrating particles that constitute the wave are different entities. D) Waves transport energy and matter from one region to another. E) A wave in which particles move back and forth in the same direction as the wave is moving is called a longitudinal wave. _______ If the force on an object is in the negative direction, the work it does on the object must be A) negative B) positive C) The work could be either positive or negative, depending on the direction the object moves _____ Which of the following is an accurate statement? A) A system like a vibrating string has only one possible frequency. B) In order for a singer to break a wine glass by singing, she must adjust the amplitude of the sound she makes so that it is exactly equal to the amplitude of vibration of the wine glass. C) The fundamental frequency of a system is the name given to the highest possible frequency at which the system will naturally vibrate. D) The sound in an organ pipe can vibrate at an infinite number of frequencies.

Answer 1

(11) When the person falls from the cliff, during his motion the person moves away from the observer at the top of the cliff. In this situation, the frequency heard by the observer is less than the original frequency. During his fall, the distance from the observer and the source of sound increases. Hence, the frequency heard by the observer at the top of the cliff decreases as the person falls from the cliff. Therefore, the correct option is (D). Note: As per the Chegg guidelines, we are supposed to answer the first question in the given list of questions.