Stage 4 of star formation is when the object can exhibit violent surface activity producing extremely strong protostellar winds. This phase is also called the:
A) protostar phase.
B) Herbig-Haro phase.
C) brown dwarf phase.
D) T Tauri phase.
E) protoplanetary nebula phase.
D
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A solenoid carrying an electric current, if free to rotate when placed in a magnetic field, will tend to orient its axis ________ (parallel, perpendicular, anti-parallel) to the magnetic field.
Fill in the blank(s) with the appropriate word(s).
When monochromatic light illuminates a grating with 7000 lines per centimeter, its second order maximum is at 62.4°. What is the wavelength of the light?
A) 452 nm B) 336 nm C) 633 nm D) 752 nm E) 363 nm
A 6.00 kg mass is located at (1.0 m, –2.00 m, 3.00 m), a 5.00 kg mass is located at (1.0 m, 3.00 m, – 2.00 m), and a 4.00 kg mass is located at (–1.0 m, –2.00 m, 2.00 m). The center of gravity of the system of masses is
A. (5/15m, -1/15m, 17/15m). B. (5/15m, -17/15m, 5/15m). C. (12/15m, -5/15m, 16/15m). D. (7/15m, -5/15m, 16/15m). E. (16/15m, -1/15m, 17/15m).
What is the change in entropy of the ice when a 0.050-kg ice cube at 0°C melts? The latent heat of fusion for water is 80 cal/g
What will be an ideal response?