Is it possible for an object to accelerate but without changing its speed?
A) Yes, for example when a car is halfway up a straight hill a hill whose slope, or angle with the horizontal, does not change and moving a an unchanging speed.
B) Yes, for example when a car turns a corner while maintaining an unchanging speed.
C) Both of the above.
D) No, because the word acceleration means a change in speed.
E) No, because the word acceleration means speeding up.
Question 2
Suppose you electrically charge a transparency by rubbing it, and then hang the transparency, at rest, by a string in the center of a room. Except for the transparency and string, the room is totally evacuated of all matter.
Neglecting any influences from outside the room, what kinds of fields would then be found at places inside the room but away from the transparency--for instance, at a point near a corner of the room?
A) an electric field only
B) a magnetic field only
C) Both an electric and magnetic field
D) No fields at all, because the transparency would create electromagnetic fields only within the transparency itself
E) No fields at all, because there is nothing no material object at such a point
Light rays coming from an object to the retina.
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