The number of cycles of a periodic process that occur per unit time is called the __________
Fill in the blank(s) with correct word
frequency
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While the Copernican model was simpler than Ptolemy's, it was no more accurate in predicting planetary behavior at first. How did Kepler improve it?
What will be an ideal response?
Which statement below is NOT an assumption made in the molecular model of an ideal gas?
A. The average separation between molecules is large compared with the dimensions of the molecules. B. The molecules undergo inelastic collisions with one another. C. The forces between molecules are short range. D. The molecules obey Newton's laws of motion. E. Any molecule can move in any direction with equal probability.
The orbits of binary pulsars will get smaller because of _______________ radiation
Fill in the blank(s) with correct word
Refer to the figure above showing the abundance of elements in the galaxy relative to hydrogen. What is the least abundant element with an atomic number less than iron's?
A) hydrogen B) lithium C) beryllium D) nitrogen