What instruments are used to obtain measurements of horizontal winds for up to 72 different levels?
A) Doppler radar
B) wind profilers
C) radiosondes
D) rawinsondes
Answer: B
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Which of the following statements about fusion is true?
A. Fusion produces no harmful radiation. B. Fusion is easier than fission. C. Fusion reactions have no critical-mass requirement. D. Fusion reactions can be easily controlled to make energy. E. none of the above
James Hutton first pioneered the principle that we know today as uniformitarianism. Indicate whether the statement is true or false
Which type of blood cells are involve in clotting?
A) erythrocytes B) leukocytes C) thrombocytes D) all of these
Positive phases of El Niño will bring
A. heavy rainfall from Chile to California. B. drought to all parts of the planet then heavy rain. C. heavy rain to Southeast Asia and Australia. D. drought conditions to Southeast Asia and Australia.