Write the node equation for node 12, which is at the junction of two different materials, A and B as shown. The following properties are given:
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Thin Films: When a beam of light that is traveling in air is reflected by a glass surface, there is
A. a 90° phase change in the reflected beam. B. no phase change in the reflected beam. C. a 180° phase change in the reflected beam. D. a 60° phase change in the reflected beam. E. a 45° phase change in the reflected beam.
A meteor shower occurs when the leftover debris of a(n) ________ intersects with our atmosphere to produce the beautiful streaks of light.
A. asteroid belt B. star C. planet D. comet
A box is to be moved across a level surface. A force of magnitude 200 N may be applied at an angle of 30° below the horizontal to push the box or at an angle of 30° above the horizontal to pull the box, either application sufficient to overcome friction and move the box. Which application will cause the box to have the greater acceleration?
a. the one below the horizontal b. the one above the horizontal c. both give equal acceleration d. more information is needed
A car traveling along the highway brakes to a stop. A greater braking force is required when the car has
A) more mass. B) more momentum. C) less stopping distance. D) all of the above E) none of the above