The work done in pushing a TV set a distance of 2 m with an average force of 20 N is
A) 2 J.
B) 10 J.
C) 20 J.
D) 40 J.
E) 800 J.
Answer: D
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Perhaps the greatest of the Greek astronomers, ________ compiled the first catalog of stars, accurately measured their positions, and defined the basic system of stellar brightnesses
A) Erastothenes B) Aristotle C) Ptolemy D) Hipparchus E) Aristarchus
The main chemical building blocks of life, carbon, nitrogen, oxygen, and iron were formed
A) inside interstellar gas clouds during star formation B) in the center of the Earth and then ejected onto the surface via volcanism C) in the nuclear burning cores of stars and then ejected into space when they died D) in the Big Bang that created the universe
A uniform linear charge of 3.0 nC/m is distributed along the y axis from y = ?3 m to y = 2m. Which of the following integrals is correct for the magnitude of the electric field at y = 4 m on the y axis?
A.
B.
C.
D.
E.
Could the resonance between the Moon's orbit and Earth affect Earth's weather? Why or why not?
What will be an ideal response?