Question 1: Based upon your data, what happens to potential and the electric field as you move the test charges closer to the fixed charge? Question 2: Based upon your data, what kinds of changes do you see in the velocities, kinetic energies, potential energies and total energies of the test particles once you start the simulations? Question 3: Is there relationship between the charge of the test particle and its velocity as it moves away from or toward the fixed charge? ============================== SCI 214 Week 4 iLab HR Diagram
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Lab 4: H-R Diagram – Gain practical understanding of the HR Diagram and investigate different classes of stars and their evolutionary paths. Instructions: Investigate the simulation with different stars to find out more about their lifetimes and paths. Follow the specific sub activities in the questions below. PreLab Questions: (2 points each) Question 1: Why does the night sky have many different brightness stars but when we look at a HR diagram they are plotted with very similar magnitudes Question 2: Why are there some stars that do not fall on the main sequence? 1.The main sequence lifetimes of stars follow a particular relationship. A consequence of this relationship is that whenever you double the mass of a star, its main sequence lifetime increases by a fixed amount. Let us test this simulation against that relationship. Set the mass of the star to 1.0 solar masses. a) What is the total main sequence lifetime of a 1 solar mass star? (Recall that the main sequence lifetime is the age that the star has at the left-most point on its curve on the HR diagram.) b) What is the total main sequence lifetime of a 2 solar mass star? c) What is the total main sequence lifetime of a star that is 4 solar masses? d) What is the ratio of the main sequence lifetime of a 1 solar-mass star to that of a 2 solar-mass star? (Show your work for full credit.) e) What is the ratio of the main sequence lifetime of a 2 solar-mass star to that of a 4 solar mass star? f) Did you get the approximately the same number? (What does approximately mean in this context ================================== SCI 214 Week 5 Daily Energy Balance