A compact disc (CD) stores music in a coded pattern of tiny pits 10 m deep. The pits are arranged in a track that spirals outward toward the rim of the disc, the inner and outer radii of this spiral are 25.0 mm -7 and 58.0 mm, respectively As the disc spins inside a CD player, the track is scanned at a constant linear speed of 1.25 m/s.

A B  C  or D

(n1-n2/n1+n2)2is reflected part and ( 4n1n2)/(n1+n2)2  is transmitted part prove that T+R=1

Compare the magnitudes of the equilibrant vectors measured from the experiment with those obtained from the graphical and component methods. Example: A: 200 g 60° above +x axis B: 300 g 45° above -x axis C: 400 g 30° below-x-axis A. A cos a = 1.96 N x cos 60°= 0.98 N B = B cos b = 2.94 N x cos 135º = -2.08 N Cx = C cos g = 3.92 N x cos 210° = -3.39 N R. A + B + C₂ = -4.49 N A, = A sin a = 1.96 N x sin 60° = 1.70 N By = B sin b = 2.94 N x sin 135° = 2.08 N Cy= C sin g = 3.92 N x sin 210° = -1.96 N Ry= Ay+ By + Cy = 1.82 N Questions: II: (a) A: 150 g 60° along +y axis B: 200 g 45° above -x axis C: 100 g 30° below -x axis A, A cos a = B₂= B cos b = C₂ = C cos g = R-A₂+B+C₂ A = A sin a = B, =B sin b = C₂ = C sin g = R₂ = A +By+C₂= R = (R₂. R₂): Quadrant (c) A: 200 g along -y axis B: 100 g 60° above +x axis C: 200 g 45° below →x axis A, A cos a= B₂B cos b = C₂ = C cos g = R₂-A₂+B+C₂ A₁ = A sin a = B = B sin b = C₁=C sin g = Ry= Ay+By+Cy= R = (R₁, R₂): Quadrant

A bright light is at top of a bilding that is 4.75 m in height. A dog is 190 cm tall walking away from this building at a 2 m/s speed on a straight path. How fast is the edge/tip of this cats shadow moving when the dog is 9 meters from the pole in meters/second (m/s)

B4

2. A satellite orbiting the Earth is powered by photovoltaic (“solar”) panels that convertlight energy to electricity with a conversion rate of 15.0%. Telemetry from the satelliteindicates that the panels are supplying a peak power output of 3.60 kW, and the specificationsof the panels state that they have 16 m^2 of light-collecting surface area. The radius of theSun and its distance from Earth have long been known to be 6.96 ×10^8 m and 1.50 ×10^11m, respectively. Assume the Sun radiates approximately as a blackbody and calculate thesurface temperature of the Sun.

Review Conceptual Example 4 as background for this problem. A man in a boat is looking straight down at a fish in the water (n = 1.333) directly beneath him. The fish is looking straight up at the man. They are equidistant from the air/water interface. To the man, the fish appears to be 2.2 m beneath his eyes. To the fish, how far above its eyes does the man appear to be? Number i Units

How many more minutes would it take light from the sun to reach Earth if the space between them were filled with water rather than a vacuum? The sun is 1.5 ✕ 108 km from Earth.

When a vertical beam of light passes through a transparent medium, the rate at which its intensity I decreases is proportional to  I(t),  where t represents the thickness of the medium (in feet). In clear seawater, the intensity 3 feet below the surface is 25% of the initial intensity  I0  of the incident beam. What is the intensity of the beam 14 feet below the surface? (Give your answer in terms of  I0.  Round any constants or coefficients to five decimal places.)