What is the medium that sounds waves travel through when a person speaks

My question: A wave front has the form of a: A. sine wave. B. circle. C. surface of a sphere. D. straight line

Complete these questions on your own paper or word document. When you are done, you will submit your answers for grading. You must show all of your work to receive full credit.

When the heart is examined, both the diaphragm and bell stethoscope pieces are used for auscultation. In general, the diaphragm is best for hearing high-pitched sounds, and the bell is most useful for hearing low-pitched sounds. A) True B) False

Two laptop computers each have a mass of 2 kg. If they are 0.5 m apart on a desk, what is the gravitational force between them? G = 6.67 * 10-11 N⋅ (m/kg) 2

A stopwatch is used to measure how long it takes a sprinter to run 100 meters. this stopwatch measures time intervals to hundredths of seconds. using the stopwatch the timekeeper measures the sprinter's time as 9.88 seconds.

A scientist has found a new drug that appears to provide weight loss in humans without dieting. The scientist has tested the drug on thousands of people and has found a few side effects.

If there are 20 Earthworms in a garden that covers 5 square meters, what is the population density of the earthworms? A. 20 Earthworms B. 4 C. 100 Earthworms per square meter D. 4 Earthworms per square meter

How are AC and DC generators different? In AC generators, commutators produce alternating current. In AC generators, no commutators or slip rings are used. In DC generators, slip rings produce direct current.

A 30.0-kg object experiences a drag force due to air resistance with a magnitude proportional to the square of its speed. The object falls with an acceleration of 4.00 m/s2 downward when it is falling downward at 70.0 m/s.

If a tank contains water 4 m deep, what is the pressure at the bottom of the tank? (Neglect the atmospheric pressure.)