The planet with the least obvious ring system is ________
Fill in the blank(s) with correct word
Neptune
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Electrons are collected by removing them from the atoms in a sample of water vapor (H2O, molecular mass 18u). If every hydrogen atom has lost an electron in the process, what is the mass of the sample if a charge of exactly 1.0C was collected?
A. 62 ?g B. 370 ?g C. 93 ?g D. 180 ?g
A monkey is sitting at the top of a tree 20 m high from the ground level. A person standing on the ground wants to feed the monkey. He uses a bow and arrow to launch the food to the monkey
If the monkey remains seated at the top of the tree, how should the person aim the arrow containing the food so that the monkey gets the food? A) He should aim it at the monkey. B) He should aim it below the monkey. C) He should aim it above the monkey. D) None of the other choices is correct.
A radio galaxy whose lobes are swept back as if forming a tail probably indicates
A) evidence for intergalactic matter. B) there must be another galaxy nearby. C) the galaxy is about to evolve into a spiral. D) the galaxy is moving towards Earth. E) the galaxy is isolated, not part of a cluster.
A 2 000-kg sailboat experiences an eastward force of 3 000 N by the ocean tide and a wind force against its sails of magnitude 6 000 N directed toward the northwest (45° N of W). What is the magnitude and direction of the resultant acceleration?