A Source Emits Sound with a Frequency of 1000 Hz

question 41

Multiple Choice

A source emits sound with a frequency of 1000 Hz. Both it and an observer are moving in the same direction with the same speed, 100 m/s. If the speed of sound is 340 m/s, the observer hears sound with a frequency of:

• A) 294 Hz
• B) 545 Hz
• C) 1000 Hz
• D) 1830 Hz
• E) 3400 Hz

---

Definitions:

Sink

A basin used for washing and typically connected to a water supply and drainage system.

Xylem

The tissue in plants that transports water and some nutrients from the roots to the leaves.

Bundle Scars

Marks left on the stem of a plant where vascular bundles or leaf traces have broken off or been removed.

Leaf Scar

Marks on a stem left when the petiole of a leaf breaks during abscission.