A person runs up a long flight of stairs in 10 seconds. If the person's weight is 600 N and the vertical height of the stairs is 20 meters, the person's power output is __________
Fill in the blank(s) with correct word
1,200 W
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In the context of stellar astronomy, briefly describe dark matter
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The center of the galaxy has been studied extensively using visible light
a. True b. False Indicate whether the statement is true or false
A 1.5m long dowel (a cylindrical rod) is pivoted about the end so that it is a pendulum of sorts - it can freely swing in a vertical plane. The dowel has a diameter of 2.0cm, and its density is 3.2 
When it is positioned in its swing such that its angle with the vertical is 22.5 degrees, what is the torque on the rod about the pivot due to its weight?
A. 17Nm B. 42Nm C. 11Nm D. 10Nm E. 44Nm F. 41 Nm
When a well is drilled into an aquifer, why does water flow out of the well spontaneously?
What will be an ideal response?