Two dolphins are swimming underwater in the same direction in the gulf of mexico. Dolphin A, swimming at Va = 5.0m/s, is ahead of Dolphin B, swimming at vg = 4.0m/s.. If Dolphin B makes a 2000 Hz call, what is the frequency heard by Dolphin A? (The speed of sound in seawater is 1530 m/s). a. f = f v - vA/v + vB.
b. f = f v - vA/v - vB.
c. f = f v + vA/v + vB.
d. f = f v + vA/v - vB.

How do hydroponic plants differ from nonhydroponic plants? a.) hydroponic plants can grow in a dryer soil. nonhydroponic plants grow in moist soil. b.) hydroponic plants grow on other plants and are known as air plants. nonhydroponic plants do not grow on other plants. c.) hydroponic plants can only grow in rain forests. nonhydroponic plants cannot grow in rain forests. d.) hydroponic plants are grown without soil. nonhydroponic plants are grown in soil.

The image below shows numerous volcanic mountains in the pacific northwest. what is the most likely cause of the volcanic and earthquake activity in this region?

Which branches of natural science include the study of an organism that lived 10 million years ago