It is desired to transport 4 m3/s of water through a rectangular finished concrete canal that can be at most 2 m wide. The slope of the land through which it passes is 0.0004. What depth of water should be expected?
(A) 1.01 m
(B) 1.28 m
(C) 1.44 m
(D) 1.83 m
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An atomic model of the atom is
A) a symbolic representation of the atom. B) a stepping stone to further understanding. C) an abstraction enabling predictions. D) all of the above
A slide projector is designed with its lens 6.0 m from the screen. The projected image is 1.5 m square of a slide object 2.5 cm square
(a) What is the object distance from the lens? (b) What should be the lens focal length? (c) What is the lens POWER?
Latent heat is always
A. part of the specific heat. B. related to the specific heat. C. the same as the mechanical equivalent of heat. D. involved in a phase change.
A 1.2-m high by 2.8-m wide vertical rectangular gate is used to control the flow of water from a reservoir to a grinding mill. A frictionless hinge runs along the bottom of the gate. The minimum force acting normal to and at the very top of the gate needed to hold the gate shut if the water is at the very top of the gate is nearest:
(A) 6590 N (B) 9800 N (C) 10 000 N (D) 13 300 N