Which of the following is an example of acceleration A. 15 m/s
B. 25 m/s east
C. -2m/s^2 west
D. 60 km/hr

Who is better, messi or cristiano, i need this for a chemistry class. asap

Mrs. smith ordered a root beer float (vanilla ice cream + root beer). mrs. smith noticed that the three states of matter (solid, liquid, and gas) all existed simultaneously in her root beer float. a. identify each phase of matter in the root beer float. b. describe the particles of all three phases of matter in the root beer float. (how are the particles arranged and moving? ) c. identify one phase change you would see in a root beer float and described what causes this change.

Why is nh3 classified as a polar molecule