_____ is a telescope that forms images by bending light with a lens
A) A refracting telescope
B) A reflecting telescope
C) The Newtonian telescope
D) The Gregorian telescope
A
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A transverse periodic wave is represented by the equation y(x, t) = 2.50 cm cos(2,500 rad/s t - 15.0
What is the frequency of the vibration of the wave?
A. 490 Hz B. 467 Hz C. 422 Hz D. 398 Hz E. 302 Hz
According to current science, why didn't oxygen begin to accumulate in the atmosphere for more than a billion years after life appeared on the Earth?
A) Oxygen was removed from the atmosphere by chemical reactions with surface rocks as quickly as it was released by life. B) Early forms of animal life consumed the oxygen released by plants during the first billion years of life on Earth. C) Early life did not release oxygen, and oxygen releasing organisms didn't evolve for a billion years after the earliest life. D) Oxygen was removed from the atmosphere by dissolving in the ocean as quickly as it was released by life.
The fusion of Li and N results in creation of
A) O and no energy transformed to other forms. B) He and energy transformed to other forms. C) He and no energy transformed to other forms. D) salami and cheese sandwiches. E) O and energy transformed to other forms.
When the energy state of an atom changes by ?E, the frequency of the photon emitted or absorbed is calculated by dividing ?E by ______________
Fill in the blank(s) with correct word