The hydroturbine shown accepts water at 4 MPa and exits to the atmosphere. If the flow rate is 2 m^3/s, the maximum power output is nearest:
(A) 80 MW
(B) 70 MW
(C) 60 MW
(D) 50 MW
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In a paramagnetic material if a large magnetic filed is first applied and then reduced to zero, the intensity of magnetization is then equal to _________.
Fill in the blank(s) with the appropriate word(s).
Which of the following materials would you expect to be isotropic?
(a) A casting of aluminum (b) Aluminum foil (c) Aluminum wire (d) A polyethylene sheet 0.01 cm (0.004 inch) thick
What is Jupiter's Great Red Spot?
A) a giant storm that is about twice as wide as the planet Earth B) a giant crater on the surface of Jupiter C) a portion of strongly heated gas near the surface of Jupiter caused by a collision with a comet D) a huge patch of sulfur in Jupiter's atmosphere E) reflected sunlight that is red for the same reason sunrises and sunsets are red on Earth
The presence of which rocks show that between 2 and 3 billion years ago the atmosphere contained less than 1% of the amount of oxygen it contains today?
A) limestone B) banded iron formations C) silicate clays D) sandstone