In a flat universe parallel lines
A) never converge.
B) are concentric to each other.
C) are mirror images.
D) eventually meet.
Answer: A
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In the figure shown, the coefficient of kinetic friction between the block and the incline is 0.29. What is the magnitude of the acceleration of the suspended block as it falls? Disregard any pulley mass or friction in the pulley.
A. 5.4 m/s2 B. 5.2 m/s2 C. 4.9 m/s2 D. 5.6 m/s2 E. 7.9 m/s2
An alpha particle is another name for a(n)
a. electron. b. proton. c. neutron. d. helium nucleus. e. photon.
The function of an enzyme is to ____
a. carry coded information to the rest of the cell b. regulate chemical reactions within a cell c. provide the basic building blocks of a cell d. carry the genetic information of a cell e. provide the structure and function of a cell
About what percent of all asteroids are C-type asteroids?
A) 5% B) 10% C) 15% D) 50% E) 75%