A Factory Siren Indicating the End of a Shift Has

question 23

Multiple Choice

A factory siren indicating the end of a shift has a frequency of 80 Hz. What frequency is perceived by the occupant of a car traveling away from the factory at 30 m/s? The speed of sound in air is 343 m/s.

• A) 73 Hz
• B) 75 Hz
• C) 77 Hz
• D) 79 Hz
• E) 81 Hz

Understand the average physical growth patterns of children from ages 2-6.

Recognize ethnic and genetic influences on children’s growth.

Identify factors influencing children's height and rate of growth.

Understand nutritional needs and common deficiencies in children's diets in developed nations.