Biology
Biology, 08.01.2020 00:31, beard6488

Why does the sound of something moving away from you seem to change to a lower and lower pitch?
a)
as the source moves away, the increased distance creates more interference; so the pitch drops.
b)
as the source moves away, the frequency of the sound waves is being compressed, so the pitch drops.
c)
as the source moves away, the sound waves speed up to reach the observer; this causes the pitch to drop.
d)
as the source moves away, the sound waves stretches out relative to the person standing still; so the pitch drops.

answer
Answers: 3

Other questions on the subject: Biology

image
Biology, 22.06.2019 00:00, mitetwojr
An organ system consists of a group of organs that performs specific functions necessary for the survival of an organism. humans have eleven different organ systems: integumentary, skeletal, muscular, nervous, endocrine, circulatory, lymphatic, respiratory, digestive, urinary, and reproductive. discuss the function of neurons, the brain and the spinal cord within the human nervous system while explaining the interrelationship of each organ.
Answers: 1
image
Biology, 22.06.2019 01:00, pandasarecute53
Some mining processes involve removal of large areas of earths surface in the mined region this practice causes severe environmental damage by allowing which natural process to accelerate in the affected areas? a. precipitation b. erosion c. migration d. condensation
Answers: 1
image
Biology, 22.06.2019 07:20, Maria3737
What are the two causes of density in deep current waters? a. salinity (how much salt) of the water and high temperaturesb. salinity (how much salt) of the water and low temperatures c. oxygen content of the water and high temperatures. d. oxygen content of the water and low temperatures
Answers: 2
image
Biology, 22.06.2019 10:00, nyasiasaunders1234
Veins have a much lower blood pressure than arteries. which of these prevents backflow of blood in veins? a. pressure applied by the heart b. one–way valves in veins c. thin muscular walls of veins
Answers: 2
Do you know the correct answer?
Why does the sound of something moving away from you seem to change to a lower and lower pitch?

Questions in other subjects: