As you well know, soap bubbles exhibit wonderful iridescent color patterns. their origin is similar to the effect that makes oil slicks colorful (see explanation in muller's book): the reflection of light at the two sides of the very thin soap film. look up what the word "iridescence" actually means and explain, why this effect occurs for soap films. if you feel a little schematie picture might your argument, feel free to supply one. (hint: interference! )

In 1995 a research group led by eric cornell and carl wiemann at the university of colorado successfully cooled rubidium atoms to the 20-200 nk temperature range. assuming (incorrectly) that the rubidium atoms behave liké particles of a classical ideal gas, calculate the rms speed of a rubidium atom at a temperature of 112.0 nk. in the experiments one particular isotope of rubidium was used, rubidium-87. the molar mass of this isotope is 86.91 q/mol. tries 0/20 submit answer

Which example has gravitational potential energy? a. a horse slowing down from a run b. an apple about to fall from a tree branch c. a bicycle being pedaled down a horizontal path d. beaker sitting on the floor

Ineed the answer to question 1 , i’m desperate