Suppose you are observing a distant galaxy whose light has taken 12 billion years to reach us. What is the maximum age that this galaxy could have been when it emitted the light we are observing now? (Assume the age of the universe is about 14 billion years.)
A) about 2 billion years old
B) about 10 billion years old
C) about 4 billion years old
D) about 12 billion years old
A) about 2 billion years old
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In silicones the backbone polymer is composed of alternating silicon atoms and _________atoms.
Fill in the blank(s) with the appropriate word(s).
Simple Pendulum: A simple pendulum takes 2.00 s to make one compete swing. If we now triple the length, how long will it take for one complete swing?
A. 6.00 s B. 3.46 s C. 2.00 s D. 1.15 s E. 0.667 s
How it is that Insull's apartment building allows more efficiency in the distribution and supply system?
What will be an ideal response?
Answer the following statement(s) true (T) or false (F)
1. 
at point P in the unprimed frame
2. 
at point P in the unprimed frame.
3. 
on the proton in the unprimed frame.