Resistors in Combination: Two 4.0-? resistors are connected in parallel, and this combination is connected in series with 3.0 ?. What is the equivalent resistance of this system?
A. 1.2 ?
B. 5.0 ?
C. 7.0 ?
D. 11 ?
Answer: B
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Suppose that at time t = 0 an electron in a magnetic field in the +z direction has state 
. Let 
The expectation value 
as a function of time in this case is which of the below?
A. 
B. 
C. 0
D. 
E. 
F. Something else (specify)
Which of the following indicates that past conditions on Mars may have been suitable for life?
A) There are very large extinct volcanoes on Mars. B) Mars has two small Moons, Phobos, and Deimos. C) There are dried up riverbeds, rock-strewn floodplains, and minerals that form in water. D) Mars has polar caps. E) Mars has been studied by numerous spacecraft, including both orbiters and landers.
Starting from rest, a car travels 1350 meters in 1.00 minute. It accelerated at 1.0 m/s2 until it reached its cruising speed. Then it drove the remaining distance at constant velocity. What was its cruising speed?
What will be an ideal response?
What was the nationality of the first persons who we know speculated about "elements"?
a. Chinese b. Egyptian c. Greek d. Roman