The physical bases of life on Earth are oxygen and water
a. True
b. False
Indicate whether the statement is true or false
False
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What does the granulation tell us about the layers below the photosphere?
What will be an ideal response?
Ferromagnetic materials lose their ability to form permanent magnets if
A) aligned north and south. B) heated above their Curie temperature. C) cooled below their Curie temperature. D) the electrons lose their spin magnetic moment. E) aligned east and west.
A car needs to generate 75.0 hp in order to maintain a constant velocity of 27.3 m/s on a flat road. What is the magnitude of the total resistive force acting on the car (due to friction, air resistance, etc.)? (1 hp = 746 W)
A) 2.05 × 103 N B) 2.75 N C) 1.03 × 103 N D) 2.87 × 103 N
About 90% of the star's total life is spent on the main sequence
Indicate whether the statement is true or false