Why does the merger of two spiral galaxies often trigger starbursts?
What will be an ideal response?
The dusty molecular clouds in spiral galaxies collide during a merger. The collision transfers angular momentum from the innermost gas clouds to the outer parts of the galaxies, which allows the inner clouds to migrate toward a common center. Huge amounts of dense clouds come together, resulting in a massive burst of star formation.
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If the work done to stretch an ideal spring by 4.0 cm is 6.0 J, what is the spring constant of this spring?
A) 300 N/m B) 3000 N/m C) 3500 N/m D) 7500 N/m E) 6000 N/m
A steel lift column in a service station is 4.0 m long and 0.20 m in diameter. Young's modulus for steel is 20 × 1010 N/m2. By how much does the column shrink when a 5000-kg truck is on it?
A) 4.7 × 10-7 m B) 8.0 × 10-7 m C) 3.2 × 10-6 m D) 7.8 × 10-6 m E) 3.1 × 10-5 m
Besides Earth, which of the terrestrial planets and/or satellites of terrestrial planets show(s) evidence for the possible existence of liquid water flowing on its surface in the past?
a. Venus b. The Moon c. Phobos d. Mars e. None of the terrestrial planets or satellites show such evidence.
Latitude and right ascension are coordinate systems used to find objects on the celestial sphere
Indicate whether the statement is true or false