(II) Two lightweight rods 24 cm in length are mounted perpendicular to an axle and at 180° to each other (Fig. 11–34). At the end of each rod is a 480-g mass. The rods are spaced 42 cm apart along the axle. The axle rotates at 4.5 rad/s. ( a ) What is the component of the total angular momentum along the axle? ( b ) What angle does the vector angular momentum make with the axle? [ Hint: Remember that the vector angular momentum must be calculated about the same point for both masses, which could be the CM .] FIGURE 11-34 Problem 40
(II) Two lightweight rods 24 cm in length are mounted perpendicular to an axle and at 180° to each other (Fig. 11–34). At the end of each rod is a 480-g mass. The rods are spaced 42 cm apart along the axle. The axle rotates at 4.5 rad/s. ( a ) What is the component of the total angular momentum along the axle? ( b ) What angle does the vector angular momentum make with the axle? [ Hint: Remember that the vector angular momentum must be calculated about the same point for both masses, which could be the CM .] FIGURE 11-34 Problem 40
(II) Two lightweight rods 24 cm in length are mounted perpendicular to an axle and at 180° to each other (Fig. 11–34). At the end of each rod is a 480-g mass. The rods are spaced 42 cm apart along the axle. The axle rotates at 4.5 rad/s. (a) What is the component of the total angular momentum along the axle? (b) What angle does the vector angular momentum make with the axle? [Hint: Remember that the vector angular momentum must be calculated about the same point for both masses, which could be the CM.]
FIGURE 11-34
Problem 40
Study of body parts and their functions. In this combined field of study, anatomy refers to studying the body structure of organisms, whereas physiology refers to their function.
At point A, 3.20 m from a small source of sound that is emitting uniformly in all directions, the intensity level is 58.0 dB. What is the intensity of the sound at A? How far from the source must you go so that the intensity is one-fourth of what it was at A? How far must you go so that the sound level is one-fourth of what it was at A?
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