The nucleus of an atom contains
A. only electrons.
B. only protons.
C. protons and neutrons.
D. electrons and protons.
Answer: C
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The eighteenth and nineteenth century slave trade represents ________ African migration while the twentieth century relaxation of U.S. immigration quotas resulted in ________ Latin American and Asia migration
A) chain; hierarchical B) forced; voluntary C) voluntary; forced D) chain; voluntary E) forced; forced
Is Kansas flatter than a pancake?
A) Yes B) No C) It is about the same flatness D) No one has calculated the answer.
The explosion of fast-food restaurants is best explained by low prices
Indicate whether the statement is true or false
The amount of solar radiation reaching Earth's surface is dependent on ____
a. the intensity of radiation only b. the duration of radiation only c. both intensity and duration of radiation d. the distance from the sun to the Earth