Which kind of telescope and which instrument or technique are shown?
a. optical, CCD
b. infrared, array detector
c. optical, adaptive optics
d. radio, interferometry
D
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In an experiment, the experimental group is:
a. not subjected to experimental error b. not exposed to experimental treatments c. maintained under strict laboratory conditions d. treated exactly the same as the control group, except for one independent variable e. statistically the most important part of the experiment
We usually think of friction "opposing motion". Explain how friction assists the motion of a car
What will be an ideal response?
Is it possible to remove heat energy from a substance and not change its temperature? Explain, and give an example
A 200-W light bulb is connected across 110 V. What current will flow through this bulb?
A) 0.90 A B) 0.36 A C) 0 A D) 0.60 A E) 1.8 A