The following language has become a lingua franca of approximately 335 million people as a first language, 375 million as a second language and 600 million as a foreign language
A) English
B) Chinese
C) French
D) Spanish
Answer: A
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What is the main tenet of Plank's quantum hypothesis?
A. Light is composed of waves that exist only at certain quantum fundamental frequencies. B. Energy is a continuum, but light is quantized. C. Energy is composed of subatomic particles called quanta. D. Energy can be converted into matter through nuclear quanta. E. Energy comes in discrete packets of a certain minimum size.
How long is it estimated to take the ocean's volume of water to circulate through the oceanic crust at
spreading centers? a. 1 million years b. 10 million years c. 100 million years d. 1 billion years
Which of the following exerts the greatest pressure?
A) a 20 gram object on a surface of 0.50 cm2 B) a 40 gram object on a surface of 2.0 cm2 C) a 60 gram object on a surface of 3.0 cm2 D) None, they all exert the same pressure.
The Earth can be described as a(n) ________ because of its magnetic field
A) protoplanet B) positive attractor C) oblate spheroid D) plate holder E) geodynamo