We can study how galaxies evolve because
A) we can watch as they interact in real time.
B) the farther away we look, the further back in time we see.
C) galaxies are transparent to visible light.
D) we are really smart astronomers.
B) the farther away we look, the further back in time we see.
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The slope of a position versus time graph gives
A) the distance traveled. B) velocity. C) acceleration. D) displacement.
Meters: An ideal ammeter should
A. have a high coil resistance. B. introduce a very small series resistance into the circuit whose current is to be measured. C. introduce a very large series resistance into the circuit whose current is to be measured. D. consist of a galvanometer in series with a large resistor.
What is an emission nebula?
A. a region of ionized gas around hot O or B type stars B. a region of gas around cool K or M type stars C. a gas cloud in globular clusters D. a region of gas around black holes
Consider the steel and concrete boundary shown in the figure and write the node equation for node n. Identify the maximum time step allowed for the explicit method of solving for temperatures.
What will be an ideal response?