What are the signs of Q, W, and ?U for the process 
?
A. 0, -, -
B. 0, +, +
C. +, -, 0
D. +, +, 0
E. -, +, 0
F. Other (specify)
B. 0, +, +
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Earth has been gradually warming over the past few decades. Based on a great deal of evidence, scientists believe that this warming is caused by ________
A) the human release of chemicals called CFCs into the stratosphere B) the increase in forest fires during recent years C) the fact that our politicians spout a lot of hot air D) human activities that are increasing the concentration of greenhouse gases in Earth's atmosphere
Compound Microscope: The focal lengths of the objective lens and the eyepiece in a microscope are 0.29 cm and 2.50 cm, respectively. An object is placed at 0.30 cm from the objective lens and the image of this object is viewed with the eyepiece adjusted for minimum eyestrain for persons with a near point of 25 cm. The magnitude of the final overall magnification of the microscope is closest to
A. 100 B. 200 C. 300 D. 410 E. 500
One result of bombardment of the Moon's surface is a layer of broken, pulverized, and powdered rock called
A. regolith. B. maria. C. lunar rays. D. basalt.
List the following time frames in order of how long they lasted, from longest to shortest.
a) Hadean eon b) Proterozoic eon c) Paleozoic era d) Cretaceous period