What happens to the pitch you hear when two sound waves constructively interfere?
A. You hear the pitch of the louder sound.
B. The pitch does not change.
C. It decreases due to the Doppler effect.
D. It increases due to the Doppler effect.

According to piaget, children have acquired the cognitive skill of conservation when they're able to a. understand that six ounces of liquid in a jar and six ounces in an elongated tube are equal. b. understand the viewpoint of other people. c. relate objects around them to their own needs. d. realize that the term heavy describes an object one way and the term big describes it another way. it is not b nor c. did this 2 x wrong..

The finches on the galapagos island were similar in form except for variations of their beaks. darwin observed that these variations were useful for: attracting a mate defending territory building nests gathering food

Apaleontologist finds a plant fossil that shows that the plant had seeds. what can the paleontologist conclude?