Answer:
the waves have a trough
Explanation:
just took the test on edg.
I dont know if this correct, but i hope it help
Gay Lussac's Law

Convert:
200°C = 200 + 273 = 473 K
50°C = 50 + 273 = 323 K
Input the value:

Answer:
It verified J. J. Thomson's work on the atomic structure. It concluded that an electron circles a nucleus in a fixed-energy orbit.
Explanation:
A chocolate chip cookie is a good example of a heterogeneous mixture. A mixture is a physical combination of two or more different pieces of matter.