Which of the following is an example of chemical change? A. Filling up a balloon with hot air.
B. Taking a glass of water and freezing it by placing it in the freezer.
C. A plant collecting sunlight and turning it into food.
D. Your dog ripping up your homework.

Aballet student who learns with the of his instructor is demonstrating learning.

What is the thinnest soap film (excluding the case of zero thickness) that appears black when illuminated with light with a wavelength of 480 ? the index of refraction of the film is 1.34, and there is air on both sides of the film. express your answer in nanometers. hint 1. how to approach th

In one or two sentences, describe how you did in the balancing game. in a few more sentences, explain one strategy you learned for balancing more complex equations.