The Doppler effect is mainly concerned with changes in
A. pitch.
B. wave amplitudes.
C. wave periods.
D. wave speed.
Answer: A
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The ____________________ force is caused by the rotation of the Earth
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Which of the following was a result of the Spanish-American War of 1898?
A) the American acquisition of the Lesser Antilles B) the American military defeat at Guantanamo Bay and surrender of all its Caribbean possessions to the Spanish C) the return of Cuba to Spanish rule D) The United States and Spain split Hispaniola, with Spain acquiring the Dominican Republic and the United States acquiring Haiti E) Cuban independence from Spain and the transfer of Puerto Rico to American sovereignty
What is a byproduct of photosynthesis
A. Oxygen and Glucose B. Carbon Dioxide C. Water D. Oxygen
This is a typical number of air masses to be over the United States at one time
A) one B) five C) 12 D) 22