What is the Oort cloud?
A. the glowing light around a meteor as it burns up
B. a region in the outer Solar System from which comets come
C. the gas boiled off a comet that forms its tail
D. a zone between the Sun and Mercury where comets burn up and release their gases
E. gas around a comet's head
Answer: B
You might also like to view...
Why is the daytime sky blue?
What will be an ideal response?
Why does gravitational contraction halt in collapsing protostars?
What will be an ideal response?
Which of the following would violate the law of charge conservation?
a. A neutron, which has zero charge, becoming an electron and a proton. b. A plastic rod becoming charged by gaining electrons from the fur rubbed against it. c. A glass rod becoming positively charged by being rubbed with silk. d. An electroscope losing its charge by being grounded. e. An electron becoming a positron which has the same mass as an electron and a positive charge of the same magnitude.
If you connect two identical bulbs to one battery in a series circuit instead of connecting the bulbs in parallel:
a. the first bulb will be brighter than the second one in the series circuit. b. each bulb is brighter in series than in parallel. c. each bulb is dimmer in series than in parallel. d. the bulbs glow just as brightly in series as in parallel. e. the battery lasts longer for the bulbs in parallel.