A ________ is a region where jets of gas from young stars impact and heat the gas surrounding the young star.
A. bipolar outflow
B. bok globule
C. planetary nebula
D. T Tauri star
Answer: A
You might also like to view...
A mass of 0.250 kg is attached to a spring and undergoes simple harmonic oscillations with a period of 0.640 s. What is the force constant of the spring?
A) 2.45 N/m B) 12.1 N/m C) 24.1 N/m D) 0.102 N/m E) 0.610 N/m
Four 1.5-volt AA batteries in series power a transistor radio. If the batteries hold a total charge of 200 C, how long will they last if the radio has a resistance of 200 ??
a. 6.0 h b. 1.9 h c. 2.6 h d. 1.4 h e. 2.4 h
After one half-life, a sample of a particular
radioactive material a) is twice as massive as the original sample of material. b) has its half-life reduced by one half. c) has only half the original activity. d) is no longer radioactive at all.
What happened to the quarks that existed freely during the particle era?
A) They combined to make protons, neutrons, and their antiparticles. B) They froze out of the soup of particles at the end of the era. C) They evaporated. D) They combined to make electrons and neutrinos. E) They combined to make W and Z bosons.