YOU DON\'T NEED TO SHOW WORK ON MULTIPLE COICE, EVERYTHING ESS SHORT ANSVER. 5.
ID: 1731603 • Letter: Y
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YOU DON'T NEED TO SHOW WORK ON MULTIPLE COICE, EVERYTHING ESS SHORT ANSVER. 5. The displacement of a vibrating string versus position along the string is shown in the figure. The periodic waves have a speed of 10.0 cm/s. A and B are two points on the string. a) What is the amplitude of the wave? -2 b) What is the wavelength of the wave? 6. The average distance between the surface of the earth and the surface of the sun is 1.49 x 1011 m How much time, in minutes, does it take light leaving the surface of the sun to reach the earth? 7. Linearly polarized light is incident upon a polarizing sheet that has a transmission axis is paralel to the incident light. The sheet is rotated about its axis through 360 (one complete revolution). At how many positions, including the initial and final positions, will the transmitted intensity be a maximum? A) 6 8) 5 C) 4 D) 3 E) 2 A cellular telephone transmits electromagnetic waves at a frequency of 835 MHz. What is the wavelength of these waves? 8. 9. A concave miror has a radius of curvature of 60.0 cm. How close to the mirror should an object be 9. A concave mirror ha placed so that the rays travel parallel to each other after reflection? 10. Which one of the following statements concerning a virtual image produced by a mirror is true? A) A virtual image is always larger than the object B) A virtual image is always smaller than the object. C) A virtual image is always upright relative to the object. D) A virtual image is always inverted relative to the object. E) A virtual image can be photographed or projected onto a screen. SCOREExplanation / Answer
5. given
y vs x graph os a string
v = 10 cm/s
a. amplitude = 4 mm
b. wavelngth, lambda = 6 cm ( from the graph)
6. distance, d = 1.49*10^11 m
c = 3*10^8 m/s
t = d/c = 496.6666s = 8 min 16 min 40 s
7. for 360 deg rotation
the transmission is maximum for 0, 180, 360 deg
hecne 3 positions
option D
8. f = 835*10^ Hz
c = 3*10^8 m/s
lambda = c/f = 0.359281437125 m
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