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A periscope for a submarine uses two totally reflection 45°-45°-90° prisms with total internal reflection on the side adjacent to the 45° angles. It springs a leak, and the bottom prism is covered with water. Explain why the periscope no long works. (nprism = 1.52, nwater = 1.33).
An air parcel moves northwards and becomes entrained in a strong westerly flow, circling the entire globe in the space of a few weeks. State the name given to this high-level flow and define briefly how its structure is related to lateral and vert..
A 230V shunt motor having an armature resistance of 0.05 ? and a field resistance of 75?? draws a line current of 7 A while running light at 1120 rev/min. determine the total core and mechanical losses
A positive charge of 0.800? C is located in a uniform field of 1.20×105 N/C. A negative charge of -0.400? C is brought near enough to the positive charge that the attractive force between the charges just equals the force on the positive charge du..
A pair of slits, separated by 0.170 mm, is illuminated by light having a wavelength of ? = 569 nm. What is the path difference for the two slits at the location y
A speedboat moves on a lake with initial velocity vector v1,x = 9.27 m/s and v1,y = -2.17 m/s, find the components of the speedboat\'s final velocity
questiona convex lens is a transparent device that uses refraction to twist and focus light from an object forming a
A daredevil decides to jump a canyon. Its walls are equally high and 10 m apart. What minimum speed must he have in order to clear the canyon
An aircraft weighing 991 N is accelerated at 11 m/s2 for 13 seconds, at which time the aircraft launches. How much work was done on the aircraft
Estimate the terminal velocity for a dust particle in air. Assume it has a radius of 1.0 um and a density similar to that of balsa wood
A vertical straight wire carrying and upward 24-A current exerts an attractive force per unit length of 8.8 X 10-4 N/m on a secon parallel wire 7.0 cm away
a mass of 200 g vibrates horizontally in Simple Harmonic Motion with a frequency of 30 Hz and amplitude 20 cm. calculate the total energy of the motion
A potter's wheel having a radius 0.55m and a moment of inertia 12kg•m2 is rotating freely at 51 rev/min. The potter can stop the wheel in 7 s by pressing a wet rag against the rim and exerting a radially inward force of 67N. Find out the effectual co..
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