4. Using the facts from question 1, imagine there was a person, unseat-belted, in the car. The person weighs 70 kg. What speed would the person be traveling at compared to the car after the collision? Explore two possibilities, and explain your reasoning fully. (Hints: Is the person part of or separate from the vehicle in terms of motion? How does the mass of the person change the problem?) Do your best!

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

What is the earliest point in the universe that we can observe? why can’t we see back further than this?

Achlorine atom has 17 protons and 18 neutrons. what is its mass number? what is its atomic number?