What is the Kuiper Belt?
A. an enormous aggregate of gas and dust from which the Solar System was formed
B. a large belt containing asteroids in a gap between the orbits of Mars and Jupiter
C. a swarm of comet nuclei in a huge shell surrounding the Sun and planets
D. a disklike swarm of icy objects that lies from near the orbit of Neptune to past Pluto's orbit
Answer: D
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The constellation of Orion is currently visible in the evenings in January. Precession will not affect this and Orion will still be visible in January 13,000 years from now
Indicate whether the statement is true or false
Molecular clouds can be observed
a. using infrared telescopes to detect ionized gas in the clouds. b. using x-ray telescope to observe the x-ray radiation from the molecules in the cloud. c. using radio telescopes to observe the CO emission from the clouds. d. by looking for blue wispy regions near star clusters. e. by looking for the 21-cm radiation from hydrogen.
In 1960, the scientist named __________ proposed the concept of seafloor spreading
a. Andrija Mohorovicic b. Harry Hess c. Alfred Wegener d. None of the above
Equilibrium: As shown in the figure, a 10.0 m long bar is attached by a frictionless hinge to a wall and held horizontal by a light rope that makes an angle ? = 49° with the bar. The bar is uniform and weighs 66.5 N. What distance x from the hinge should a 10.0 kg mass be suspended for the tension in the rope to be 177 N?
Fill in the blank(s) with the appropriate word(s).