How can a tapered channel (tapchan) work to produce energy? Explain
What will be an ideal response?
The waves from the ocean at high tide can fill a reservoir, and as the level of the
ocean falls as the tide goes out there is gravitational potential energy that can be converted to
work (or electricity).
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Magnetic particle inspection can detect only _________cracks.
Fill in the blank(s) with the appropriate word(s).
A walker walks 30 m from the origin toward the WEST to point A. She then walks from point A, 20 m more toward the EAST to point B. The walker's total displacement form the origin is
A. 50 m toward the EAST. B. 30 m toward the WEST. C. 20 m toward the WEST. D. 10 m toward the EAST. E. 10 m toward the WEST.
Why did early civilizations observe constellations?
A) only for religious reasons B) for practical reasons, such as navigation and helping to determine seasons C) only for recreational reasons D) only to predict a person's destiny
A standard exam page is 8.5 inches by 11 inches. An exam that is 2.0 mm thick has a volume of
A. 1.9 × 104 mm3. B. 4.7 × 104 mm3. C. 1.2 × 105 mm3. D. 3.1 × 105 mm3. E. 3.1 × 103 mm3.