Planetary orbits are
a. parabolas c. circles
b. ellipses d. none of the above.
B
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The Greenhouse Effect on Venus is due to ________ in its atmosphere
Fill in the blank(s) with correct word
Which of the following describes a nonmetal?
A) poor conductor of electricity B) shiny C) malleable D) ductile E) good conductor of heat
A charged particle (mass = M, charge = Q > 0) moves in a region of space where the magnetic field has a constant magnitude of B and a downward direction. What is the magnetic force on the particle at an instant when it is moving horizontally toward the north with a speed V?
a. QVB toward the east b. Zero c. QVB toward the west d. QVB upward e. QVB toward the south
A 1.50-m long gas column that is open at one end and closed at the other has a fundamental resonant frequency 80.0 Hz. What is the sound speed in this gas?
A) 120 m/s B) 53.3 m/s C) 30.0 m/s D) 213 m/s E) 480 m/s