An object of length 3.00 cm is inside a plastic block with index of refraction 1.40 . If the object is viewed through the top surface of the block at a non-zero angle from the normal, where is the object relative to its image?
a. in the same direction as its image
b. above the direction of its image
c. below the direction of its image
d. More information is needed.
c
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A horizontal force of 12 Newtons is applied to a 4.0 kg box that slides on a horizontal surface. The box starts from rest moves a horizontal distance of 10 meters and obtains a velocity of 5.0 m/s. The surface has friction. The friction force is
A. 7.0 N. B. 6.5 N. C. 6.0 N. D. 5.7 N. E. 4.9 N.
Knowing that the dot near the upper center of the Sun in this photo is the planet Venus, you can conclude that the photo was taken
A) during a transit. B) when Venus is at greatest western elongation. C) when Venus is at greatest eastern elongation. D) when Venus is at superior conjunction.
A book is placed on a chair. Then a videocassette is placed on the book. The floor exerts a normal force
a. on all three. b. only on the book. c. only on the chair. d. upwards on the chair and downwards on the book. e. only on the objects that you have defined to be part of the system.
Transformers: The primary coil of an ideal transformer has 100 turns and its secondary coil has 400 turns. If the ac voltage applied to the primary coil is 120 V, what voltage is present in its secondary coil?
A. 100 V B. 30 V C. 70 V D. 480 V E. 400 V