What is the connection between an ENSO and the Peruvian anchovy catch? Explain
What will be an ideal response?
The correlation was observed experimentally first The anchovy catch plummets
sometimes. It was found that this takes place when ENSO conditions (large-scale changes
in sea surface temperatures over the entire Pacific Ocean) occur. In one case, the winds push
a mound of water to the western Pacific which pushes the cooler water near the west coast
of South America upward, and fish eat the upwelling nutrients and the population surges. In
the opposite condition, the cooler waters along the coast are pushed downward, and the fish
population crashes.
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What is the energy of a photon whose frequency is 2.9 × 10^20 Hz? (h = 6.63 × 10^?34 J?s and 1 eV = 1.60 × 10^?19 J)
a. 0.2 MeV b. 1.2 MeV c. 1.9 MeV d. 3.1 MeV e. 0.8 MeV
At an altitude of 3 times the radius of the Earth, the acceleration due to gravity is
a. g/3. c. g/27. b. g/9. d. not given.
The warming of the lower atmosphere (the greenhouse effect) results from the
A) absorption of long-wave solar radiation. B) reflection of long-wave terrestrial radiation. C) absorption of long-wave terrestrial radiation by atmospheric gases. D) release of atmospheric gases into the ozone layer.
Three objects experience interactions. Object A has mass, object B has electrical charge, and object C has both mass and electrical charge. Object A and object B have a rope connected between them. Which of the following statements are true?
A. the electrical force on A due to B has the same magnitude as the gravitational force on B due to A B. the gravitational force on C due to A has the same magnitude as the gravitational force on A due to C C. the rope force on A due to B has the same magnitude as the electrical force on B due to A D. the rope force on B due to A has the same magnitude as the gravitational force on A due to C