According to Galileo, inertia is a
A) force like any other force.
B) special kind of force.
C) property of all matter.
D) concept opposite to force.
Answer: C
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On a planet whose Moon is in the same orbital plane as the planet's orbit around its star, how often will solar eclipses occur?
a) Twice every orbit of its moon (twice a month). b) Once every orbit of the planet around its Sun (its year). c) Twice every rotation of the planet (twice a day). d) Once every orbit of its moon (its month). e) Once every rotation of the planet (its day).
All of the following are true. Which of the following is Not a consequence of precession of the Earth's spin axis?
a) the path that the earth orbits in a slightly elliptical b)which star is called the North Star changes in time c) the instant of the Vernal equinox occurs 20 minutes earlier each year
A star is seen to have two transiting planets. Planet 1 transits every 3 months, and Planet 2 transits every 15 months. What can we infer about their orbits? (Hint: Review the use of Newton's version of Kepler's Third law from Ch. 4)
A) Planet 2's semimajor axis is about 5 times smaller than Planet 1's. B) Planet 2's semimajor axis is about 3 times smaller than Planet 1's. C) Planet 2's semimajor axis is about 3 times larger than Planet 1's. D) Planet 2's semimajor axis is about 5 times larger than Planet 1's.
A dry cell battery is no longer useful when its ________ (two words) becomes large.
Fill in the blank(s) with the appropriate word(s).