State the law of the conservation of mechanical energy
What will be an ideal response?
In a conservative system, the sum of all types of kinetic energy and potential energy is constant and equals the total mechanical energy of the system.
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To initiate star formation in a cloud, you need a __________
a. slow contraction of a molecular cloud b. rotating molecular cloud c. magnetic field d. shock
Stars continue to form in the halo of our Galaxy today
Indicate whether the statement is true or false
Polaris is a second magnitude star, and Phi Pegasi is about 16 times fainter than Polaris. What is the approximate magnitude of Phi Pegasi?
a. 18 b. ?14 c. 3 d. ?3 e. 5
Fresh water leaves the ocean by evaporation,
A) and seawater freezing. B) precipitation, and runoff. C) sublimation, seawater freezing. D) and formation of ice.