An atom with fewer electrons than protons is a __________
Fill in the blank(s) with correct word
positive ion
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The Great Explosion of Eta Carinae expelled about ________ solar masses of material and released about as much visible energy as a supernova
Fill in the blank(s) with correct word
What is true of irregular galaxies?
A.) They have spiral arms but are smaller than the spiral galaxies. B.) They have regular, smooth structures. C.) They are usually larger than spiral galaxies. D.) They have no defined shape or structure.
Suppose you find a rock that contains 10 micrograms of radioactive potassium-40, which has a half-life of 1.25 billion years
By measuring the amount of its decay product (argon-40 ) present in the rock, you conclude that there must have been 80 micrograms of potassium-40 when the rock solidified. How old is the rock? A) 3.75 billion years B) 2.5 billion years C) 5.0 billion years D) 1.25 billion years
Willis thinks over the discussion of the second part of the first experiment described on pages 30-31 . He is interested in the equality of the force he exerts on the clone and the one the clone exerts on him
Later he tells his girlfriend Sheena "It may be right in that case, because both people had the same mass. It's wrong if the masses are different. If I met the Hulk and he pushed me, it would be with a greater force than I could use to push him back." Discuss this reasoning.