Does an electric field exert a force on a moving charged object? Assume the motion of the charged object is along the x axis and the field is in the y direction
1.yes
2.no
1
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A boy and a girl are riding a merry-go-round which is turning at a constant rate. The boy is near the outer edge, while the girl is closer to the center. Who has the greater tangential acceleration?
A) the boy B) the girl C) Both have the same non-zero tangential acceleration. D) Both have zero tangential acceleration. E) There is not enough information given to answer the question.
Contrast the compositions and heights of the clouds of Earth and Venus
What will be an ideal response?
You listen to a live orchestra concert from a cheap seat far away, high up in the balcony. The music seems to be a little out of sync with the conductor's beat. Why?
a. The musicians are paying no attention to the conductor. b. You are noticing a time lag due to the finite speed of sound. c. The orchestra is not very good. d. The viola section is dragging.
Which of these is impossible, by the second law of thermodynamics?
A. An engine that generates electricity by extracting heat from cold water and dumping waste heat to warmer air B. A single match carelessly discarded causes 1500 acres of woodland to burn C. Using heat exhausted by a refrigerator to cook a meal D. Water evaporating from a lake and then condensing to form clouds