A careful photographic survey of Jupiter's moon Io by the spacecraft Voyager 1 showed active volcanoes spewing liquid sulfur to heights of 70 km above the surface of this moon. If the value of g on Io is 2.0 m/s2, estimate the speed with which the liquid sulfur left the volcano
a. 260 m/s
b. 530 m/s
c. 790 m/s
d. 970 m/s
b
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A common opinion concerning the creationism versus evolution controversy is the idea that Earth was created fairly recently but that it was created with fossils and other evidence of great age already present, so that Earth has the appearance of
being very old even though it is really quite young. This opinion is best classified as A) a scientific hypothesis for which there is currently insufficient evidence. B) a scientific opinion that is probably incorrect. C) nonscientific because it contradicts common sense. D) nonscientific because there is no conceivable scientific way to disprove it. E) a scientific opinion that is certainly incorrect.
Imagine another solar system, with a star of the same mass as the Sun. Suppose a planet with a mass twice that of Earth (2MEarth) orbits at a distance of 1 AU from the star. What is the orbital period of this planet?
A) 1 year B) 6 months C) 2 years D) It cannot be determined from the information given.
To make an uncharged object have a positive charge:
A. remove some neutrons B. add some neutrons C. add some electrons D. remove some electrons E. heat it to cause a change of phase
A circuit consists of three identical lamps connected to a battery as in Figure OQ28.14. The battery has some internal resistance. The switch S, originally open, is closed. What happens to the total power delivered to the lamps by the battery?