What is the primary basis upon which we divide the ingredients of the solar nebula into four categories (hydrogen/helium; hydrogen compound; rock; metal)?
A) the temperatures at which various materials will condense from gaseous form to solid form
B) the locations of various materials in the solar nebula
C) the atomic mass numbers of various materials
D) the amounts of energy required to ionize various materials
A
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What is the "chicken-and-egg" type problem we face when trying to decide which came first–proteins or nucleic acids?
A) proteins and nucleic acids probably looked very different before the origin of life B) nucleic acids cannot replicate without proteins, and proteins cannot be made without nucleic acids C) early proteins and nucleic acids were very similar to each other D) proteins and nucleic acids are always present together at the same time
A positive charge Q is located at the center of an imaginary Gaussian cube of sides a. The flux of the electric field through the surface of the cube is ?. A second, negative charge -Q is placed next to Q inside the cube
Which of the following statements will be true in this case? A) The net electric field on the surface of the cube is equal to zero B) The electric field on the surface of the cube is perpendicular to the surface C) The magnitude of the net electric field is constant on the entire surface of the cube D) The net flux through the surface of the cube is equal to zero E) The net flux through the surface is equal to 2?
When you look into a pool of water, the depth looks less than it actually is because of __________
Fill in the blank(s) with correct word
Air at a temperature of 32°F has a relative humidity of 60%. If the temperature of the same air increases, the relative humidity increases
a. True b. False Indicate whether the statement is true or false