Some globular clusters have three main sequence tracks. This indicates:
A) three different stellar compositions.
B) three episodes of star formation, separated by billions of years.
C) stars evolve through three different mechanisms.
D) the stars were observed from three different telescopes.
A
You might also like to view...
A racecar goes around a 200 m radius curve at a constant speed of 40 m/s. Its acceleration is __________
Fill in the blank(s) with correct word
Consider 2 LRC circuits at critical damping. In which circuit does the initial charge on the capacitor decrease to 10% of its value the fastest?
A) in the circuit with the smallest initial charge on the capacitor B) in the circuit with the largest resistance C) in the circuit with the largest LC product D) in the circuit with the smallest LC product E) in the circuit with the largest initial charge on the capacitor
Which of the following would be the best radiator of thermal energy?
A) a shiny surface B) a perfectly white surface C) a perfectly black surface D) a metallic surface E) styrofoam
Answer the following statement(s) true (T) or false (F)
1. In example C4.2, if we had modeled the atoms as solid spheres instead of modeling the nuclei as point-like particles, we would have gotten the same result for the system’s center of mass