According to Bernoulli?s principle, the total energy of a system is _____
a. constantly changing
b. determined by the velocity
c. determined by the flow rate
d. the same at all points if the flow rate is constant
d
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The solid-state relay is a device that has become increasingly popular for ____.
a. heating applications b. DC applications c. switching applications d. blending applications
Las operaciones de elevación y aparejamiento DEBEN detenerse cuando la temperatura:
a. está por debajo de los 32?F. b. sea lo suficientemente alta como para que los trabajadores sufran fatiga por el calor si no se toman medidas. c. esté por encima de los 90?F. d. sea lo suficientemente baja como para que las estructuras de acero de la grúa o las que se utilizan para la elevación puedan fracturarse con un golpe o impacto.
Match these descriptions to their corresponding terms
a. affects distribution of soil particles and water b. causes soils to develop, mature, and age c. affects rate of weathering d. influences fertility and texture of soil e. causes decay of organic material f. removes soluble materials g. topsoil h. organic i. parent material j. subsoil 6. temperature/rainfall 7. living organism 8. parent material 9. topography 10. leaching 11. weathering 12. Horizon O 13. Horizon A 14. Horizon B 15. Horizon C
____ clamps are very similar to bar clamps. The advantage of these clamps is that the ends can be attached to a section of standard 1/2-in. (13 mm) pipe.
A. Specialty B. Bar C. Cam-lock D. Pipe