A parallel universe is
A. another universe that exists separate from the space of our universe.
B. a universe in which parallel light beams remain parallel.
C. an open universe.
D. a closed universe.
E. a universe in which events occur in a logical order.
Ans: A. another universe that exists separate from the space of our universe.
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The force of gravity from one object extends to infinity never going to zero.When we say that gravitation is universal we mean that
a. the Earth exerts gravitational force on objects on its surface b. the Earth exerts a gravitational force on its moon and vice versa c. the Earth, moon and sun exert gravitational forces on each other d. all material objects in the universe exert gravitational forces on one another.
A key difference between the tragedy of the commons and TANSTAAFL is that
a. TANSTAAFL applies to chemistry, the tragedy of the commons to physics. b. both apply to all situations; so there is no difference. c. TANSTAAFL applies to sociology, the tragedy of the commons to economics. d. TANSTAAFL applies to economics, the tragedy of the commons to physical systems. e. TANSTAAFL applies to physical systems, the tragedy of the commons to socialsystems.
The first eukarya appeared
A) 4.6 billion years ago B) around 3.5 billion years ago C) 4.0 billion years ago D) at least 2.1 billion years ago or perhaps even earlier
An ideal gas is allowed to expand adiabatically. Assume the process is reversible. What is the change in entropy?
a. 0 b. nR ln (V2/V1) c. nR ln (T2/T1) d. kn ln (V2/V1) e. kn ln (T2/T1)