A man 155 cm tall is walking at the rate of 1.2 m/s away from a lamp post 4.2 m high. At what rate is the tip of his shadow moving away from the lamp post?
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A man 155 cm tall is walking at the rate of 1.2 m/s away from a lamp post 4.2 m high. At what rate is the tip of his shadow moving away from the lamp post?
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- A man, 1.76m tall is walking on a horizontal street at 3kph away from a vertical street light, 3.7m high. How fast (kph) is the tip of his shadow moving relative to the top of the street light when he is 2m from the base of the street light?A man 167.68 centimeters tall .is walking directly away from a lamp postfronting a building at the rate of 91.46 centimeters per second. If the lamp is 8meters above the ground, finda. The rate at which his shadow is lengtheningb. The rate at which the tip of the shadow is movingThe fish in a pond is 15 m from the shore. Above what depth will he not be able to see a small rock at the water's edge? (nsu=1,33)
- Light traveling in first medium with a speed of 1.5x108 m/s, strikes the surface of a transparent material where it travels at a speed of 2x108 m/s. The incident angle is 37°, find the critical angle between the two media. 48.59° 48.21° 53.36° 56.21°Light passes from air into ice with part of the ray reflected and part refracted. The reflected and refracted rays are at 90° with each other. What is the velocity of light in ice? 2.11 X 108 m/s 2.01 X 108 m/s 1.94 X 108 m/s 1.73 X 108 m/sA swimmer, who is looking up from under the water, sees a diving board directly above at an apparent height of 4 m above the water. What is the actual height of the diving board? 3.00 m 5.33 m 2.18 m 1.09 m
- With the sun directly overhead, an airplane takes off at a speed S of 235 mph at an angle θ of 17° above the horizontal. How fast is the airplane's shadow moving along the runway?Comput the index of refraction for the substance where light propagates with speed V=2.8*10^8 m/sLight passes from air into ice with part of the ray reflected and part refracted. The reflected and refracted rays are at 90° with each other. What is the velocity of light in ice? Incident angle = 30 2.11 X 108 m/s 2.01 X 108 m/s 1.94 X 108 m/s 1.73 X 108 m/s
- The speed of light changes when it goes from ethyl alcohol (nea = 1.31) to carbon tetra- chloride (nct = 1.641). What is the ratio vct of the speeds?The speed of light in a material is is 2.2 x 108 m/s. What is the index of refraction? Question 11 options: 6.6 1.00 0.73 1.36It is the fundamental SI unit of length. It is the length of the path traveled by light in a vacuum during a time interval of 1/3.0 x10^8 second a. kilometer b. centimeter c. milimeter d. meter