Kepler's third law, p2 = a3, means that
A) a planet's period does not depend on the eccentricity of its orbit.
B) all orbits with the same semimajor axis have the same period.
C) the period of a planet does not depend on its mass.
D) planets that are farther from the Sun move at slower average speeds than nearer planets.
E) All of the above are correct.
E
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The cell theory states that all organisms consist of one or more cells, the cell is the basic unit of life, and all cells arise from existing cells. This is a scientific theory. How could the cell theory be disproven?
What will be an ideal response?
On the main screen of the interactive figure, select "Parallax", then select the "Introduction to Parallax" button. Click the play button to watch the animation, and watch how the motion of the photographer (lower window) affects what the camera sees (upper window). Which of the following statements correctly describes what is really happening? (Note: You need not continue with the next button to answer this question.)
A. The photographer is moving, but the person being photographed and the trees are staying still. B. The trees are moving more slowly than the person being photographed, who is moving more slowly than the photographer. C. The photographer is staying still, but the person being photographed and the trees are moving. D. The photographer, the person being photographed, and the trees are all moving at the same speed.
Originally 2.00 mol of gas are at standard temperature and pressure If the temperature changes to 47.0°C and the pressure decreases to half of what it was, how many liters do the two moles now occupy? (1 atm = 101 kPa, R = 8.31 J/mol ? K)
What will be an ideal response?
A system of 18 electrons and 11 neutrons has a net charge of
a. –28.8 × 10^-19 C. b. 28.8 × 10^-19 C. c. –11.2 × 10^-19 C. d. –18.0 × 10^-19 C. e. 11.2 × 10^-19 C.