.12 A series of water waves travels with the frequency of 30 Hz. The distance measured from the first to fifth adjacent crests is 40 cm. What is the speed of the waves? * 1)6
2)3

Avalue that describes how heavy an object is and is related to the force of gravity is

Ineed asap! list 3 examples in which friction us or makes things easier in our daily life. explain the effect of friction for each. *make sure you explain the effect of friction for each example! *

Argon, neon, and xenon are examples of