If you stand closer to a concave mirror than a distance of one focal length, the image you see is
a. real and inverted.
b. real and upright.
c. virtual and inverted.
d. virtual and upright.
e. none of the above because you do not get an image.
d
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A 5.00-kg object moves clockwise around a 50.0 cm radius circular path. At one location, the speed of the object is 4.00 m/s
When the object next returns to this same location, the speed is 3.00 m/s. (a) How much work was done by non-conservative forces as the object moved once around the circle? (b) If the magnitude of the above non-conservative forces acting on the object is constant, what is the minimum value of this magnitude?
Compression cannot produce
A) anticlines. B) synclines. C) normal faults. D) reverse faults.
Dark energy is the term used to describe ____
a. the pressure inflating "voids" in the distribution of galaxies b. radiation from antimatter and non-baryonic matter c. a component of the cosmic microwave background radiation d. an effect that works with gravity to decelerate the expansion of the Universe e. an effect that works against gravity to accelerate the expansion of the Universe
Which would you expect to be more viscous, a polymer made of long molecular strands or one made of short molecular strands? Why?
A) short molecular strands because of a greater density B) long molecular strands because they tend to tangle among themselves C) short molecular strands because their ends are typically polar D) long molecular strands because of a greater molecular mass