2. Kiran is doing a summer internship in a physics lab that uses optical fibres. Their Thorlabs 1550BHP fibre has specifications listed here. To the right is a diagram of the various layers (thicknesses to scale) and the definition of the bending radius (not to scale). Kiran needs to route a beam of A = 1550 nm light through a tight mechanical setup and needs to keep the curves larger than the listed minimum bend radius (Long Term). Assume that any curves are circular (i.e. the curve makes a perfect circular arc segment) and Coating Cladding Core Cladding Coating that all the light is perfectly aligned when it enters the fibre. Bending Radius a) Draw a diagram of the situation showing the light beams, the core, and core-cladding interface of the fibre. Include a circular bend of the minimum bending radius, and the path of the light beams as they reflect. b) Based on the minimum bending radius, what is the ratio of the indices of refraction of the core and cladding material? I.e. find…

1. Tobenna is visiting the penguin exhibit at a zoo. He sees a penguin swimming underwater, using its beak to look for food at the bottom of the tank. According to a tour guide, the tank is 2.0 m deep. The index of refraction of the water is the usual one of 1.33, and Tobenna is standing right at the edge of the tank. a) Tobenna's excellent depth perception tells him the penguin is 5.3 m away. He has taken PHYS 102 so he knows that this is just an apparent distance. Determine the apparent and actual horizontal distances of the penguin from the edge of the tank. b) If Tobenna crouches down so his head is only 1.0 m above the ground, will he perceive the penguin to be closer or further from the wall than in a)? c) Is there a place where Tobenna could stand where he would not see the penguin at all, despite being able to draw a straight line between his eyes and the penguin? (i.e. due to refraction, not from standing around a corner.) d) This question is qualitative only. You don't need…

Reta 2. The force of gravity between two objects becomes stronger/twice as strong) LAWS OF MOTION 99 if the distance between them is halved. (four times 3. The force of gravity is weaker on the moon than on earth because the moon has less 4. The gravitational force exerted by the earth on an object is called the object's (Analysis) (mass/distance) (Application) (weight/mass) (Understanding) ANSWERS 1. decreases 2. four times stronger 3. mass 4. weight. Numericals Find the gravitational force between two bodies of masses 50 kg each, situated at 1 m from each other. Ans. 1.67 x 107 N. 2. Find the attractive force between moon and earth if mass of earth is 6 x 1024 kg, mass of moon is 7.4 × 1022 kg and moon is at a distance of 3.84 x 108 m from the earth. Ans. 2.01 x 1020 N. 3. How does the gravitational force between two bodies change, if the distance between them is reduced to half? Calculate the value of 'g' at height of 3 times to radius of earth. Ans. 4 times. Ans. g/16. Ans. 60 kg.…

6. [0/5 Points] DETAILS MY NOTES PREVIOUS ANSWERS ASK YOUR TEACHER PRACTICE ANOTHER The emf in the figure below is 4.38 V. The resistances are R₁ = 26.02, R2 = 26.50, and R3 = 38.00. Find the following. R₁ R2 R3 (a) the current in each resistor (Give your answers to at least three significant figures.) 12= 13 = A A A (b) the power consumed by each resistor P1 P₂ = P3 W W W (c) the power supplied by the emf device Enter a number. W Viewing Saved Work Revert to Last Response SUBMIT ANSWER KatzPSE1 29.P.040.

The stators in a gas turbine are designed to increase the kinetic energy of the gas passing through them adiabatically. Air enters a set of these nozzles at 300 psia and 700°F with a velocity of 76 ft/s and exits at 250 psia and 645°F. Calculate the velocity at the exit of the nozzles. The specific heat of air at the average temperature of 672.5°F is cp=0.253 Btu/lbm⋅R . The velocity at the exit of the nozzles is __________ ft/s.

A desktop computer is to be cooled by a fan whose flow rate is 0.34 m³/min. Determine the mass flow rate of air through the fan at an elevation of 3400 m where the air density is 0.7 kg/m³. Also, if the average velocity of air is not to exceed 103 m/min, determine the diameter of the casing of the fan. Air outlet Air inlet Exhaust fan The mass flow rate of air through the fan is The diameter of the casing of the fan is kg/min. cm.

Air at 80 kPa and 127°C enters an adiabatic diffuser steadily at a rate of 6600 kg/h and leaves at 100 kPa. The velocity of the airstream is decreased from 230 m/s to 30 m/s as it passes through the diffuser. The gas constant of air is 0.287 kPa·m3/kg·K. The enthalpy of air at the inlet temperature of 400 K is h1 = 400.98 kJ/kg. Determine the exit area of the diffuser.   The exit area of the diffuser is_______  m2.

There is a ring of metal flying through space towards Earth. The ring's velocity and normal vector both point right towards Earth. The ring is on the left and the Earth is on the right. The ring is initially constant and uniform magnetic field is pointing upwards relative to the ring's direction of motion. What is the distribution of charges on the ring

Steel train rails are laid in 15.0-m-long segments placed end to end. The rails are laid on a winter day when their temperature is -1.0 °C. Part A How much space must be left between adjacent rails if they are just to touch on a summer day when their temperature is 34.0°C? Express your answer to two significant figures and include the appropriate units. D= 0.0058 Submit 0 ? m Previous Answers Request Answer × Incorrect; Try again; 4 attempts remaining Part B If the rails are originally laid in contact, what is the stress in them on a summer day when their temperature is 34.0°C? Express your answer using two significant figures. Enter positive value if the stress is tensile and negative value if the stress is compressive. ΤΟ ΑΣΦ TA F = -7.7.107 Submit Q Previous Answers Request Answer × Incorrect; Try Again; 5 attempts remaining ? Pa