Which of the following statements about a globular cluster is true?
A) All stars in the cluster are approximately at the same stage in evolution.
B) Most of the stars in the cluster are younger than 10 billion years old.
C) Most stars in the cluster are yellow or reddish in color.
D) All stars in the cluster have approximately the same mass.
E) There is an approximately equal number of all types of stars in the cluster.
C
You might also like to view...
When the sum of the external forces and the sum of the external torques on a body are both zero, we can conclude that
A. the body is moving at constant velocity but is not rotating. B. the body is rotating at constant angular velocity but has no linear velocity. C. the body has neither linear nor angular velocity. D. the body may have constant linear or angular velocity, but not both simultaneously. E. the body may have constant linear or constant angular velocity, or both simultaneously.
X-rays with a wavelength of 0.00100 nm are scattered at 130° by free electrons
What is the kinetic energy of each recoil electron? (1 eV = 1.60 × 10-19 J, melectron = 9.11 × 10-31 kg, c = 3.00 × 108 m/s, h = 6.626 × 10-34 J ? s) A) 0.68 MeV B) 0.34 MeV C) 0.99 MeV D) 2.0 MeV E) 0.50 MeV
For which value of ? is the height of a projectile fired from ground level a maximum?
A) 30° above the horizontal B) 45° above the horizontal C) 55° above the horizontal D) 60° above the horizontal E) 90° above the horizontal
An experiment was done where a "primordial soup" of water, methane, carbon dioxide and ammonia was electrified. Following this, the material was found to contain many of the amino acids found in all living things on Earth
The purpose of this experiment was to: A) determine whether DNA could have formed from electrolysis. B) determine whether DNA could have formed from amino acids. C) determine whether DNA could have formed from water and methane. D) determine whether amino acids could have formed naturally on Earth. E) determine whether amino acids could have formed from water, methane, carbon dioxide and ammonia.