Much of the world’s coal was formed during the ____
a. Jurassic Period, which had a warm, wet climate
b. Jurassic Period, which had a cool, dry climate
c. Carboniferous Period, which had a warm, wet climate
d. Carboniferous Period, which had a cool, dry climate
C
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Follow the steps of the Systematic Approach of Section 14.4—that is, (1) identify the system, (2) determine whether the process is batch or rate, (3) construct a schematic diagram with inputs and outputs, (4) Label known material quantities or rates of flow and so on.
Two liquids, A and B, are mixed together. A is 5.00 percent solids, the rest water. B is 11.0 percent solids, the rest water. To the mixture is added 18.5 kg of bone-dry solids resulting in a mixture of 2 150 kg containing 8.25 percent solids. What were the original amounts of the liquids A and B?
Según OSHA, las herramientas y los aparatos portátiles no deben conectarse a tierra:
a. si tienen un sistema aprobado de doble aislamiento. b. si van a desecharse. De otra manera, todas las herramientas y los aparatos portátiles siempre deben conectarse a tierra. c. si tienen aislamiento. d. si consumen menos de 10 amperios de corriente.
Give three specific shortcomings of monoculture
What will be an ideal response?
If the diode in a half-wave rectifier opens, ________
A) the output voltage would be zero B) the output voltage would not change C) the output voltage would equal the transformer secondary voltage D) the output ripple would be very small