EBK UNDERSTANDING OUR UNIVERSE (THIRD E
EBK UNDERSTANDING OUR UNIVERSE (THIRD E
3rd Edition
ISBN: 9780393631760
Author: Blumenthal
Publisher: VST
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Chapter 4, Problem 34QAP
To determine

The quantum efficiency and its contribution in detection of faint astronomical objects.

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To get there they need to travel through an area of salt-water, which seems to also be a magical portal, before arriving in a dry area.  Judging by the time Maui and Moana spend falling through the water, it seems they dive 3440. ft deep.  Assume the portal is non-magical salt-water, with a density of 1027 kg/m^3. Given that the air pressure above the portal is 1.013 ⋅10^5 Pa, what is the pressure when they are 3440. ft deep?  1 m = 3.28 ft. Moana would have a surface area of 1.30 m2. How much force would be acting on her at the bottom of this portal?
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