A girl is standing in front of a concave mirror. Consider two rays of light, one from her nose and one from her mouth that are parallel as they are traveling toward the mirror. These rays will come together
a. at the focal point.
b. at the center of curvature.
c. at the image point.
d. behind the mirror if she is too close to the mirror.
a
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What charge appears on the plates of a 2.0-?F capacitor when it is charged to 100 V?
A) 0 ?C B) 50 ?C C) 100 ?C D) 150 ?C E) 200 ?C
A bubble having a diameter of 1.00 cm is released from the bottom of a swimming pool where the depth is 5.00 m. What will the diameter of the bubble be when it reaches the surface? The temperature of the water at the surface is 20.0°C, whereas it is 15.0°C at the bottom. (The density of water is 1.00 × 103 kg/m3.)
A. 1.05 cm B. 1.15 cm C. 1.45 cm D. 1.65 cm E. 1.35 cm
Which of the following is the correct equation for the momentum of a photon?
A) p = (hc)/? B) p = ?/c C) p = (hc)/f D) p = (hf)/c E) p = (h?)/c
Choose all the items that derive from radioactivity
A. helium for children's balloons B. volcanic lava C. warmth in deep mines D. most cancer in the United States