The youngest star cluster is the one where the brightest main-sequence stars are
A) O stars. B) G stars. C) A stars. D) B stars. E) M stars.
A
You might also like to view...
What does the constellation Cygnus consist of?
A) All the bright stars that lie inside the illustration of a swan on star maps. B) All of the stars and other objects that lie inside the agreed upon boundary lines. C) The stars inside of the Summer Triangle. D) About 9 stars connected by two imaginary lines. E) The star Deneb.
You observe an object to be moving in a straight line at a constant speed. What can you conclude? (Assume the object does not have any engines or other power source.)
A) The net force acting on the object is zero. B) No forces of any kind are acting on the object. C) The only force acting on the object is gravity. D) The only force acting on the object is air resistance. E) Some unseen force must be keeping the object in motion.
A string on a guitar is stretched between two points 30.0 cm apart with a tension of 100 N. The mass/length of the string is 0.003 kg/m. The wavelength of the mode of vibration with the lowest frequency is
A. 0.3 m. B. 0.4 m. C. 0.5 m. D. 0.6 m. E. 0.7 m.
The electrical force between two particles of unlike charge will be ________
a. repulsive b. attractive c. zero