The James Webb Space Telescope is designed primarily to observe
A. light of all wavelengths
B. gamma rays
C. X-rays
D. infrared light
E. visible light
Answer: D. infrared light
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What is the correct method to subtract a vector from another vector?
a. Put one on top of the other, put a minus sign by the lower one, and then subtract as if they were numbers. b. Draw an arrow from the head of the first vector to the tail of the second. c. Add the two vectors and make the result negative. d. Turn the arrow you are subtracting around, and then add. e. Draw an arrow from the tail of the first vector to the head of the second.
You ride on an elevator that is moving with constant upward acceleration while standing on a bathroom scale. The reading on the scale is
A) equal to your true weight, mg. B) more than your true weight, mg. C) less than your true weight, mg. D) zero. E) could be more or less than your true weight, mg, depending on the magnitude of the acceleration.
Recent work with type I supernovae at great distances suggests the universe may in fact be accelerating its expansion, a discovery attributed to a newly found
A) repulsive charge on dark matter. B) polarization and a universal spinning magnetic field. C) dark energy. D) magnetic field associated with antimatter. E) mass determined for the neutrinos.
An atom with atomic number 3 is in its ground state. How many electrons are in its outermost shell?
What will be an ideal response?