Which object has larger kinetic energy: a 500-kg object moving with a speed of 40 m/s or 1000-kg object moving at 20 m/s?
A) the 500-kg object moving at 40 m/s
B) Both have same kinetic energy.
C) the 1000-kg object moving at 20 m/s
D) Kinetic energy is independent of mass.
E) Kinetic energy is independent of speed.
A
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About 2% of our solar nebula consisted of elements besides hydrogen and helium. However, the very first generation of star systems in the universe probably consisted only of hydrogen and helium
Which of the following statements is most likely to have been true about these first-generation star systems? A) There were no comets or asteroids in these first-generation star systems. B) Jovian planets in these first-generation star systems had clouds made of water and other hydrogen compounds. C) These first-generation star systems typically had several terrestrial planets in addition to jovian planets. D) Like the jovian planets in our solar system, the jovian planets in these first-generation systems were orbited by rings.
Which of the following temperature scales has the smallest unit interval?
a. Celsius b. Kelvin c. Fahrenheit d. None of these
Kepler's second law of planetary motion gives a relationship concerning equal ______________ in equal periods of time
Fill in the blank(s) with correct word
Where does the Kuiper belt lie?
a. between Mars and Jupiter b. between Uranus and Neptune c. between Neptune and Pluto d. in the region just beyond Neptune e. well beyond the orbits of the planets