A mirror with a focal length 20 cm has a 4.0 cm tall object placed 100 cm in front of it. What is the position of the image?
A) 25 cm behind the mirror
B) 20 cm behind the mirror
C) 20 cm in front of the mirror
D) 25 cm in front of the mirror
E) 100 cm in front of the mirror
D
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Which jovian planet has the most extreme seasonal changes, and why?
A) Uranus, because of its extreme axis tilt B) Jupiter, because of its large mass C) Saturn, because it has an axis tilt similar to Earth D) Neptune, because of its varying distance from the Sun
R-09 insulation provides more resistance to the flow of heat than R-12 insulation
What will be an ideal response?
You drop a stone from a bridge to the river below. After this stone has traveled a distance d, you drop a second stone. The distance between the two stones will always
A) increases. B) decreases. C) stays constant. D) increases at first, but then stays constant. E) decreases at first, but then stays constant.
A hydrogen atom is in the 6h state. How many electrons are allowed in this state?
A) 22 B) 18 C) 14 D) 10 E) 6